It's 2024 now and this still happens. Also, becuse I did it on Zwift I can't use the workaround methos (can't change the type of virtual activity).

Still broken for me, have been having this issue for over a year now.
I have emailed support and they have just said 'they are aware of the issue' but offered no help other than the workaround.

With subscriber cost going up, its ever more embarrassing that nobody seems to care enough to fix this bug. 

STILL BROKEN - Strava. I used to praise you at conferences in front of hundreds of people, now I talk about this as another basket case study. Shameful CX and hopeless QA/QC on the most basic of features. 

I can sort the code for you if you like. There are plenty of working scripts out there to process power data and funnily enough - they actually work!

It still appears to be an issue with Zwift rides. The workaround unfortunately does not work with 'virtual rides'. I can't change the activity type for Zwift rides.

I am getting this issue, i cant change my activity type (it wont let me) have tried everything suggested here. Even deleted the file and uploaded a fit file which i had downloaded from zwift.

Any suggestions/fixes?

I was able to change the activity type (zwift "virtual ride") in the strava app.  Changed it from a "virtual ride" to a "ride" and now that particular ride's power curve shows up in the composite/aggregated power curve (last 6 weeks and 2024) when previously it did not.  the strava website still does not allow a virtual ride to be changed to a different activity type.

Power curve often isn’t updated. Virtual rides don’t show and you can’t change the virtual ride into another type. 
No solution given from Strava. Seems one of the reasons to pay is gone.