I keep on getting this same error, I can't figure it out for this past month

use a constant text as tag, for example user to get all information of the current user

Clear TinyDB, correct your blocks accordingly and test

use Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools
Taifun


Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by icon24 Taifun.