Same issue here, this is quite humiliating and I don't know what to tell my customers except that Apple is broken. Please fix.

Just curious, has anyone been successful at actually "Trying agian later" as the error suggests? I need to add new beta testers, should I try again later or is Testflight completely grounded?? Please someone let me know!

I also get this error using NWConnection and UDP I can see the disableFragmentation boolean property but have no way to access it. How do you disable fragmentation completely?

Where are the 1099-K tax forms? These forms are being requestied by IRS, does Apple provide this information anywhere?