Could not open app /UI2/INTEROP

Hello Experts:

I am having troubles while try to open an extended app of the standard “APPROVE TRAVEL EXPENSES”.

The Launchpad says: “Could not open app. Try again later”.

Here we can see the console with the errors.

I go to the transaction /IWFND/ERROR_LOG to see what happened and it says there is a problem with the object and I have to see the “UI2 application log” (transaction SLG1)

In the “UI2 application log” I can see my error and it says problem is with the service /UI2/INTEROP.

But I go to the transaction /IWFND/MAINT_SERVICE and I check that UI2/INTEROP is activated so I can´t find the solution.

I have deployed other extended applications but cannot open this one.

If somebody could help will be helpful.

Thank you very much

Best regards