Hi Alex,
this looks suspiciously like an acces denied Error. Do you see any executions for the functions in the Monitoring? (You can access the Monitoring by clicking on the Burger Menu in the top right, the entry should be at the bottom of the list.)
If there is an error, you should see the name of the executed function and a red indicator on the left.
If there are no corresponding entries, please make sure you are either logged in, or there is an anonymous access set up for the Application. The role should include the access to all used connectors/templates.
In order to narrow down the error, you can also try to attach one shape after the other and testing in between. This way you will see exactly at which point the execution fails.
Kind Regards
Lukas