Can't create laps or intervals

I want to split this race into 5 laps, but none of the tools to add intervals are working for me. When I press A, a band briefly shows up but then disappears.

When I try the trick to “Clear all intervals” I get this error:

Am I missing something? I don’t have power or heart rate data - do I need that to create intervals? I just want to see average speed for each of the 5 laps.

Tried this with an activity without power and heartrate, and it‘s not pssible to create an interval from these activities. Also no interval summary is shown.
This seems to be a bug @eva

@R2Tom or @eva any fix for this yet? I still can’t make intervals in any of my activities.

Thanks!