So I am using the TelloFPV and attempted to do some POI stuff, 360 videos and similar stuff, but got an error saying 'Can't activate AP'. I have no idea what does this mean or how to fix this. I know this is not an official DJI/Ryze app, so I'm not really expecting them to solve this, but decided to ask here from fellow Tello owners who possibly have experienced this same problem and possibly solved it as well. So any ideas?

I'll reply here myself as I have done some observations about the subject later on.

When I went outside on a bright sunny day with no noticeable wind and took some test flights while attempting to use the POI, 360 etc., I noticed I didn't get the error and the functions seemed to work fine. So what I am deducting from this is that the problem is related to the level of lighting the VPS sensors receive. If there is not enough light for them, it is more likely for the error to pop up. If there is enough light, you'll probably be able to use these functions without problems.