Guys I have a very strange issue and becomming desparate! (I have alreay reported this to PowerApps support team.
I get a slew of authentication or payload errors when trying to edit PowerApps on my laptop. I have tried the usual cache clears, InPrivate, different browsers (IE,Chrome,Edge) however nothing seems to work and so far support is not coming up with anything. When I edit my powerapp, the datasources fails to load/connect.
Now is the weird bit... if I my personal laptop, I get the errors. If I use my work laptop (same account, permissions, licences etc) it works absolutely fine. I have deleted and readded the data sources, from connections area "outside" of the app. Within the app the datasources cannot be refresh (authentication error), and if I remove them, I am unable to add them as they are all missing.
So my question is has anyone else experienced this oddness? Is there a hidden Powerapps cache stored locally on devices that could be cleared?