As I understood from the standard Inbox custom form does not work, I corrected mta.yaml so that this form was launched as if locally from the application and after that the task icon appeared in my application and the form worked
Hello!
I have the same problem:
Log-dbg.js:452 2022-01-31 10:09:55.435100 Cannot create componentppg.customUIfor smart template rendering. Showing standard task in the detail screen as a fallback: failed to load 'ppg/customUI/Component.js' from /pp...