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Your message translates (into English) as:

The application package conflicts with an existing package, so the installation could not be completed.
Done

What other extensions are you using ?

Hello, thank you for your reply.
I’m using the Dialogs extension from community.appinventor.mit.edu (URL: All Rescued Extensions from Thunkable Classic Community - #6 by gordonlu310).
This is the simplified version of my .aia file — could the issue be caused by a conflict with the extension?
App.aia (164.9 KB)

Your aia has no issue ,its working fine. It might be because you already installed same package , search and uninstall the app and try to install again

como agregan el typefacePath?

How can i get this menu to stay the same place in bottom, so it not follow the screen when i use the scroll?

What is the latest update for this extension? Is it possible for you to send me the latest update?

Download it yourself from the first post in this topic.

I apologize. I saw new releases in the comments and it became confusing.