diff --git a/src/frontend/src/components/chatComponent/buildTrigger/index.tsx b/src/frontend/src/components/chatComponent/buildTrigger/index.tsx
index d29f7ea7b..db691133d 100644
--- a/src/frontend/src/components/chatComponent/buildTrigger/index.tsx
+++ b/src/frontend/src/components/chatComponent/buildTrigger/index.tsx
@@ -121,7 +121,7 @@ export default function BuildTrigger({
     // Step 3: Wait for the stream to finish
     while (!finished) {
       await new Promise((resolve) => setTimeout(resolve, 100));
-      finished = validationResults.length === flow.data.nodes.length;
+      finished = validationResults.length === flow.data!.nodes.length;
     }
     // Step 4: Return true if all nodes are valid, false otherwise
     return validationResults.every((result) => result);
diff --git a/src/frontend/src/contexts/tabsContext.tsx b/src/frontend/src/contexts/tabsContext.tsx
index ced7a2fee..89b8da0a5 100644
--- a/src/frontend/src/contexts/tabsContext.tsx
+++ b/src/frontend/src/contexts/tabsContext.tsx
@@ -28,6 +28,7 @@ import {
 import { getRandomDescription, getRandomName } from "../utils/utils";
 import { alertContext } from "./alertContext";
 import { typesContext } from "./typesContext";
+import { tweakType } from "../types/components";
 
 const uid = new ShortUniqueId({ length: 5 });
 
@@ -78,7 +79,7 @@ export function TabsProvider({ children }: { children: ReactNode }) {
     edges: any;
   } | null>(null);
   const [tabsState, setTabsState] = useState<TabsState>({});
-  const [getTweak, setTweak] = useState<TweaksType[]>([]);
+  const [getTweak, setTweak] = useState<tweakType>([]);
 
   const newNodeId = useRef(uid());
   function incrementNodeId() {
diff --git a/src/frontend/src/controllers/API/api.tsx b/src/frontend/src/controllers/API/api.tsx
index 8771fa67e..b0f173e2f 100644
--- a/src/frontend/src/controllers/API/api.tsx
+++ b/src/frontend/src/controllers/API/api.tsx
@@ -2,6 +2,7 @@ import axios, { AxiosError, AxiosInstance } from "axios";
 import { useContext, useEffect, useRef } from "react";
 import { URL_EXCLUDED_FROM_ERROR_RETRIES } from "../../constants/constants";
 import { alertContext } from "../../contexts/alertContext";
+import { errorsVarType } from "../../types/tabs";
 
 // Create a new Axios instance
 const api: AxiosInstance = axios.create({
@@ -37,7 +38,7 @@ function ApiInterceptor(): null {
                   "Check if the backend is up",
                   "Endpoint: " + error.config?.url,
                 ],
-              });
+              } as errorsVarType);
               return Promise.reject(error);
             }
           }
diff --git a/src/frontend/src/controllers/API/index.ts b/src/frontend/src/controllers/API/index.ts
index b7f19dd0b..be3d4f2e9 100644
--- a/src/frontend/src/controllers/API/index.ts
+++ b/src/frontend/src/controllers/API/index.ts
@@ -179,7 +179,7 @@ export async function downloadFlowsFromDatabase() {
   }
 }
 
-export async function uploadFlowsToDatabase(flows: FlowType[]) {
+export async function uploadFlowsToDatabase(flows: FormData) {
   try {
     const response = await api.post(`/api/v1/flows/upload/`, flows);
 
diff --git a/src/frontend/src/modals/ApiModal/index.tsx b/src/frontend/src/modals/ApiModal/index.tsx
index 0b7b763bd..51611ac83 100644
--- a/src/frontend/src/modals/ApiModal/index.tsx
+++ b/src/frontend/src/modals/ApiModal/index.tsx
@@ -16,7 +16,7 @@ import CodeTabsComponent from "../../components/codeTabsComponent";
 import IconComponent from "../../components/genericIconComponent";
 import { EXPORT_CODE_DIALOG } from "../../constants/constants";
 import { TabsContext } from "../../contexts/tabsContext";
-import { FlowType, NodeType } from "../../types/flow/index";
+import { FlowType, NodeType, TweaksType } from "../../types/flow/index";
 import { buildTweaks } from "../../utils/reactflowUtils";
 import {
   getCurlCode,
@@ -26,7 +26,7 @@ import {
 } from "../../utils/utils";
 import BaseModal from "../baseModal";
 import { tweakType } from "../../types/components";
-import { APITemplateType } from "../../types/api";
+import { APITemplateType, TemplateVariableType } from "../../types/api";
 
 const ApiModal = forwardRef(
   (
@@ -43,7 +43,7 @@ const ApiModal = forwardRef(
   ) => {
     const [open, setOpen] = useState(false);
     const [activeTab, setActiveTab] = useState("0");
-    const tweak = useRef<tweakType[]>([]);
+    const tweak = useRef<tweakType>([]);
     const tweaksList = useRef<string[]>([]);
     const { setTweak, getTweak, tabsState } = useContext(TabsContext);
     const pythonApiCode = getPythonApiCode(flow, tweak.current, tabsState);
@@ -92,7 +92,7 @@ const ApiModal = forwardRef(
     }
 
     useEffect(() => {
-      if (flow["data"]["nodes"].length == 0) {
+      if (flow["data"]!["nodes"].length == 0) {
         startState();
       } else {
         tweak.current = [];
@@ -179,12 +179,12 @@ const ApiModal = forwardRef(
           },
         ]);
       }
-    }, [flow["data"]["nodes"], open]);
+    }, [flow["data"]!["nodes"], open]);
 
     function filterNodes() {
       let arrNodesWithValues: string[] = [];
 
-      flow["data"]["nodes"].forEach((t) => {
+      flow["data"]!["nodes"].forEach((t) => {
         Object.keys(t["data"]["node"]["template"])
           .filter(
             (n) =>
@@ -207,7 +207,7 @@ const ApiModal = forwardRef(
         return self.indexOf(value) === index;
       });
     }
-    function buildTweakObject(tw: string, changes: string | string[], template: APITemplateType) {
+    function buildTweakObject(tw: string | string[], changes: string | string[] | boolean, template: TemplateVariableType) {
       if (template.type === "float") {
         changes = parseFloat(changes);
       }
diff --git a/src/frontend/src/modals/formModal/index.tsx b/src/frontend/src/modals/formModal/index.tsx
index c0ce2aa5f..aa4bb8ace 100644
--- a/src/frontend/src/modals/formModal/index.tsx
+++ b/src/frontend/src/modals/formModal/index.tsx
@@ -317,7 +317,7 @@ export default function FormModal({
       setErrorData({
         title: "There was an error sending the message",
         list: [error.message],
-      });
+      } as errorsVarType);
       setChatValue(data.inputs);
       connectWS();
     }
diff --git a/src/frontend/src/modals/genericModal/index.tsx b/src/frontend/src/modals/genericModal/index.tsx
index 1b1da2c3a..42954fde6 100644
--- a/src/frontend/src/modals/genericModal/index.tsx
+++ b/src/frontend/src/modals/genericModal/index.tsx
@@ -1,4 +1,4 @@
-import { useContext, useEffect, useRef, useState } from "react";
+import { Ref, RefObject, useContext, useEffect, useRef, useState } from "react";
 import SanitizedHTMLWrapper from "../../components/SanitizedHTMLWrapper";
 import ShadTooltip from "../../components/ShadTooltipComponent";
 import IconComponent from "../../components/genericIconComponent";
@@ -42,7 +42,7 @@ export default function GenericModal({
   const [wordsHighlight, setWordsHighlight] = useState<string[]>([]);
   const { setErrorData, setSuccessData, setNoticeData } =
     useContext(alertContext);
-  const ref = useRef<HTMLTextAreaElement | undefined>();
+  const ref = useRef<RefObject<HTMLTextAreaElement>>();
   const divRef = useRef(null);
   const divRefPrompt = useRef(null);
 
@@ -208,7 +208,7 @@ export default function GenericModal({
               <TextAreaContentView />
             ) : type !== TypeModal.PROMPT ? (
               <Textarea
-                ref={ref!}
+                ref={ref}
                 className="form-input h-full w-full rounded-lg focus-visible:ring-1"
                 value={inputValue}
                 onChange={(e) => {
diff --git a/src/frontend/src/types/api/index.ts b/src/frontend/src/types/api/index.ts
index 502f41f42..fa2a0d22e 100644
--- a/src/frontend/src/types/api/index.ts
+++ b/src/frontend/src/types/api/index.ts
@@ -1,10 +1,10 @@
 import { Edge, Node, Viewport } from "reactflow";
 //kind and class are just representative names to represent the actual structure of the object received by the API
-
-export type APIObjectType = { kind?: APIKindType; [key: string]: APIKindType };
+export type APIDataType = { [key: string]: APIKindType }
+export type APIObjectType = { kind: APIKindType; [key: string]: APIKindType };
 export type APIKindType = { class: APIClassType; [key: string]: APIClassType };
 export type APITemplateType = {
-  variable?: TemplateVariableType;
+  variable: TemplateVariableType;
   [key: string]: TemplateVariableType;
 };
 export type APIClassType = {
diff --git a/src/frontend/src/types/components/index.ts b/src/frontend/src/types/components/index.ts
index 6b7ed7287..273427ca8 100644
--- a/src/frontend/src/types/components/index.ts
+++ b/src/frontend/src/types/components/index.ts
@@ -1,6 +1,6 @@
 import { ReactElement, ReactNode } from "react";
 import { ReactFlowJsonObject } from "reactflow";
-import { APIClassType, APITemplateType } from "../api";
+import { APIClassType, APITemplateType, TemplateVariableType } from "../api";
 import { ChatMessageType } from "../chat";
 import { FlowStyleType, FlowType, NodeDataType, NodeType } from "../flow/index";
 import { typesContextType } from "../typesContext";
@@ -217,11 +217,11 @@ type test = {
 
 
 
-export type tweakType = {
+export type tweakType = Array<{
   [key: string]: {
     [char: string]: string;
-  };
-};
+  } & FlowStyleType;
+}>;
 
 export type apiModalTweakType = {
   current: Array<{
@@ -419,7 +419,7 @@ export type codeTabsPropsType = {
   setActiveTab: (value: string) => void;
   isMessage?: boolean;
   tweaks?: {
-    tweak?: { current: Array<tweakType> };
+    tweak?: { current: tweakType };
     tweaksList?: { current: Array<string> };
     buildContent?: (value: string) => ReactNode;
     getValue?: (
@@ -428,9 +428,9 @@ export type codeTabsPropsType = {
       template: APITemplateType
     ) => string;
     buildTweakObject?: (
-      tw: string,
-      changes: string | string[] | boolean | number,
-      template: APITemplateType
+      tw: string | string[],
+      changes: string | string[] | boolean,
+      template: TemplateVariableType
     ) => string | void;
   };
 };
diff --git a/src/frontend/src/types/tabs/index.ts b/src/frontend/src/types/tabs/index.ts
index faddf40e1..277d2a7a7 100644
--- a/src/frontend/src/types/tabs/index.ts
+++ b/src/frontend/src/types/tabs/index.ts
@@ -1,5 +1,6 @@
 import { Dispatch, SetStateAction } from "react";
 import { FlowType, TweaksType } from "../flow";
+import { tweakType } from "../components";
 
 export type TabsContextType = {
   saveFlow: (flow: FlowType) => Promise<void>;
@@ -34,8 +35,8 @@ export type TabsContextType = {
   ) => void;
   lastCopiedSelection: { nodes: any; edges: any } | null;
   setLastCopiedSelection: (selection: { nodes: any; edges: any }) => void;
-  setTweak: Dispatch<SetStateAction<TweaksType[]>>;
-  getTweak: TweaksType[];
+  setTweak: (tweak: tweakType) => tweakType | void;
+  getTweak: tweakType;
 };
 
 export type TabsState = {
diff --git a/src/frontend/src/types/typesContext/index.ts b/src/frontend/src/types/typesContext/index.ts
index f6aca183e..85b430a45 100644
--- a/src/frontend/src/types/typesContext/index.ts
+++ b/src/frontend/src/types/typesContext/index.ts
@@ -1,6 +1,6 @@
 import { Edge, Node, ReactFlowInstance } from "reactflow";
 import { AlertItemType } from "../alerts";
-import { APIClassType, APIObjectType } from "../api";
+import { APIClassType, APIDataType, APIObjectType } from "../api";
 
 const types: { [char: string]: string } = {};
 const template: { [char: string]: APIClassType } = {};
@@ -14,7 +14,7 @@ export type typesContextType = {
   setTypes: (newState: {}) => void;
   templates: typeof template;
   setTemplates: (newState: {}) => void;
-  data: APIObjectType;
+  data: APIDataType;
   setData: (newState: {}) => void;
 };
 
diff --git a/src/frontend/src/utils/utils.ts b/src/frontend/src/utils/utils.ts
index 96054d868..5e69c834d 100644
--- a/src/frontend/src/utils/utils.ts
+++ b/src/frontend/src/utils/utils.ts
@@ -5,7 +5,7 @@ import { IVarHighlightType, groupDataType, groupedObjType, tweakType } from "../
 import { FlowType, NodeType } from "../types/flow";
 import { TabsState } from "../types/tabs";
 import { buildTweaks } from "./reactflowUtils";
-import { APIClassType, APIObjectType } from "../types/api";
+import { APIClassType, APIDataType, APIObjectType } from "../types/api";
 
 export function classNames(...classes: Array<string>): string {
   return classes.filter(Boolean).join(" ");
@@ -89,7 +89,7 @@ export function checkUpperWords(str: string): string {
 export const isWrappedWithClass = (event: any, className: string | undefined) =>
   event.target.closest(`.${className}`);
 
-export function groupByFamily(data: APIObjectType, baseClasses: string, left: boolean, flow?: NodeType[]): groupedObjType[] {
+export function groupByFamily(data: APIDataType, baseClasses: string, left: boolean, flow?: NodeType[]): groupedObjType[] {
   const baseClassesSet = new Set(baseClasses.split("\n"));
   let arrOfPossibleInputs: Array<{ category: string; nodes: string[]; full: boolean; }>  = [];
   let arrOfPossibleOutputs: Array<{ category: string; nodes: string[]; full: boolean; }> = [];
@@ -234,7 +234,7 @@ export function varHighlightHTML({ name }: IVarHighlightType): string {
   return html;
 }
 
-export function buildTweakObject(tweak: tweakType[]) {
+export function buildTweakObject(tweak: tweakType) {
   tweak.forEach((el) => {
     Object.keys(el).forEach((key) => {
       for (let kp in el[key]) {