In the Teams Desktop App, guest account users can't open the Lists app tab.
When the guest user opens the tab, after 20-30 seconds, the message "There was a problem reaching this app" is displayed.
The same error does not occur in the Teams web app.
I tried the following steps, but the error didn't go away.
Sign out -> Sign in
Reinstall Teams desktop app
Clear Teams cache
Can you tell me how to solve it?