Cannot run a project

I have a project which has vertical menu assigned as main (initial App0. For some reason when I run it I get an error: INVALID DATA.
I tried to run this locally and on production server with the same result. I’m asmost sure it is not a matter of permission. The menu has SC SECURITY turned off so I really have no idea what might be causing a problem. locally I run WAMP server. This same menu opens without problems from SC.

The menu has several Login Apps liked and other things, so when I type in directly a link to open for example a Login App - this App opens without problems

ANY CLUE ?

your app is called App0? I assume it is names the same in the 3 locations you mention?

Are the local server and production server using the same backend to run the site?

Try to put on the option Enable direct call by URL in Security