"To upload app preview, you must use Safarin and OS X 10.10" - this error pops when I'm trying to upload a video.Obviously, I am.The video file is MOV, portrait 1080x1920, H.264. if anything is wrong with the video, the error don't tell me that.Anyone seen anything like that before?

The 'Sea Creator' sample app demonstrating Safari Web Extensions first fails to compile, because due to disambiguation extension bundle id isn't prefixed with app bundle id. When fixed by changed ids the app fails on start, with error saying that the app can't find extension. Regardless, extension works on its own in Safari, but can't communicate with the host app due to aforementioned error.

Trying to test StoreKit purchases in our existing game from Xcode ends in failure. I have created a couple of consumable purchases which mirror the real ones, but an attempt to buy any one of them on a device (not simulator) ends in error "Purchase failed: unable to communicate with a helper application". This happens right after payment confirmation screen. This is on the first iOS 14 beta and first Xcode 12 beta. Any suggestions on how to work around that are welcome.