diff --git a/src/backend/langflow/interface/chains/custom.py b/src/backend/langflow/interface/chains/custom.py
index 2b12cb121..01dd9bab0 100644
--- a/src/backend/langflow/interface/chains/custom.py
+++ b/src/backend/langflow/interface/chains/custom.py
@@ -97,7 +97,7 @@ class TimeTravelGuideChain(BaseCustomConversationChain):
 
 
 class CombineDocsChain(CustomChain):
-    """Implementation of AgentInitializer function"""
+    """Implementation of load_qa_chain function"""
 
     @staticmethod
     def function_name():
diff --git a/src/backend/langflow/interface/loading.py b/src/backend/langflow/interface/loading.py
index 0d3070f75..acc0cbd39 100644
--- a/src/backend/langflow/interface/loading.py
+++ b/src/backend/langflow/interface/loading.py
@@ -151,6 +151,15 @@ def instantiate_vectorstore(class_object, params):
             "The source you provided did not load correctly or was empty."
             "This may cause an error in the vectorstore."
         )
+
+    # Chroma requires all metadata values to not be None
+    if class_object.__name__ == "Chroma":
+        for doc in params["documents"]:
+            if doc.metadata is None:
+                doc.metadata = {}
+            for key, value in doc.metadata.items():
+                if value is None:
+                    doc.metadata[key] = ""
     return class_object.from_documents(**params)