Hi!
In the branch you are checking for the widgets visibility BEFORE it is even created. That cannot work, the target is not valid yet.
Use an “is valid?” instead, to figure out if it already exists.
Or right click on the “Character inventory”-Reference and choose “Convert to Validated Get”, no return bool and branch necessary this way, a bit more elegant.
(Tip: If a widget is already created, you could use “Is in Viewport” (returns bool), but in this case not an option.)
Cheers!