I have noticed that right now when cloning the appinventor sources and running on localhost the typeblocking does not work.
@Ramiro welcome to community,
Is there any error message and can you please explain more about problem? Because I have already used type blocking for bug fixing in local development server.
I've no issue with that.
Based on the error message in the video, it seems like your Blockly.mainWorkspace is getting reset to undefined somehow. Are you seeing this issue with the production instance or just when you build master?