Add possible installation issues page (#1627)

* Update Langflow CLI installation and usage instructions

docs/docs/getting-started/cli.mdx

@@ -1,6 +1,5 @@
 # 🖥️ Command Line Interface (CLI)
 
-
 ## Overview
 
 Langflow's Command Line Interface (CLI) is a powerful tool that allows you to interact with the Langflow server from the command line. The CLI provides a wide range of commands to help you shape Langflow to your needs.
@@ -8,9 +7,9 @@ Langflow's Command Line Interface (CLI) is a powerful tool that allows you to in
 Running the CLI without any arguments will display a list of available commands and options.
 
 ```bash
-langflow --help
+python -m langflow --help
 # or
-langflow
+python -m langflow
 ```
 
 Each option is detailed below:

docs/docs/index.mdx

@@ -45,6 +45,14 @@ python -m pip install langflow --pre --force-reinstall
 pipx install langflow --python python3.10 --fetch-missing-python --pip-args="--pre --force-reinstall"
 ```
 
+<Admonition type="tip">
+  <p>
+    Please, check out our [Possible Installation Issues
+    section](/migration/possible-installation-issues) if you encounter any
+    problems.
+  </p>
+</Admonition>
+
 We recommend using --force-reinstall to ensure you have the latest version of Langflow and its dependencies.
 
 ### ⛓️ Running Langflow
@@ -52,7 +60,7 @@ We recommend using --force-reinstall to ensure you have the latest version of La
 Langflow can be run in a variety of ways, including using the command-line interface (CLI) or HuggingFace Spaces.
 
 ```bash
-langflow run # or langflow --help
+python -m langflow run # or langflow --help
 ```
 
 #### 🤗 HuggingFace Spaces
@@ -93,7 +101,7 @@ langflow run [OPTIONS]
 Find more information about the available options by running:
 
 ```bash
-langflow --help
+python -m langflow --help
 ```
 
 ## Find out more about 1.0

docs/docs/migration/possible-installation-issues.mdx

@@ -0,0 +1,27 @@
+# Possible Installation Issues
+
+This is a list of possible issues that you may encounter when installing Langflow 1.0 Alpha and how to solve them.
+
+## No module named 'langflow.**main**'
+
+TLDR;
+
+- Run _`python -m langflow run`_ instead of _`langflow run`_. If that doesn't work, run _`_python -m pip install langflow --pre -U`_ to reinstall langflow.
+- If the above doesn't work, run _`python -m pip install langflow --pre -U --force-reinstall`_ to reinstall langflow and its dependencies.
+
+When you try to run langflow using the command `langflow run`, you may encounter the following error:
+
+```bash
+> langflow run
+Traceback (most recent call last):
+ File ".../langflow", line 5, in <module>
+  from langflow.__main__ import main
+ModuleNotFoundError: No module named 'langflow.__main__'
+```
+
+For this error to occur, two scenarios are possible:
+
+1. You've installed langflow using _`pip install langflow`_ but you already had a previous version of langflow installed in your system.
+   In this case, you might not be running the correct executable.
+   To solve this issue, you can run the correct executable by running _`python -m langflow run`_ instead of _`langflow run`_ and if that doesn't work, you can try uninstalling langflow and reinstalling it using _`python -m pip install langflow --pre -U`_.
+2. Some version conflicts might have occurred during the installation process. Run _`python -m pip install langflow --pre -U --force-reinstall`_ to reinstall langflow and its dependencies.

docs/sidebars.js

@@ -29,6 +29,7 @@ module.exports = {
       label: " Migration Guides",
       collapsed: false,
       items: [
+        "migration/possible-installation-issues",
         // "migration/flow-of-data",
         "migration/inputs-and-outputs",
         // "migration/supported-frameworks",