I have the same problem, did anyone solve this?

Apple we also need this - we want to bring our iPad app, that prints a lot, to Mac. This stop us from being able to do it.

Update: i'm not sure why, but changing the required iOS version on the framework from iOS 9 to iOS 12 solved the problem. The framework did indeed run on iOS 9 but we don't need it to anymore...

... and this same friend has found this: https://github.com/WebKit/WebKit/pull/13111 So I guess it is fixed, and we just need an iOS update to include the fix.....

Ah, i've been given a hand by a friend: this appears to be referenced in this webkit bug in the most recent comment: "So now we are back at forcing the users to tap and hold to save, hope this will get resolved soon!" https://bugs.webkit.org/show_bug.cgi?id=231995

In my case project min level is iOS 12 so that's not it

I typed a whole reply, and this website threw it away. Yes I know about showSystemUserInterface(), it's not appropriate for our app at all (does not apply to kiosk-style / guest user scenarios). Short version: we can't conform the Apple Human Interface Guidelines and offer the functionality of portrait mode because Apple has chosen to not allow us to disable portrait mode when we need to get 60 FPS. It's very confusing for the user to start a task and have a totally unrelated step that includes an out-of-app popup. I filed FB11317925.

... as was pointed out elsewhere, I had thought this member was static but it is not, it is an instance member.

Loading kext, running chown on se_SecurityMessages did not fix mount_smbfs for me on Big Sur 11.6. Always unknown error.

I tried converting PNG to JPG and that solved it. I can't believe Apple's regressed this far -- to not even handle PNG uploads properly? I'm trying to upload a PNG that's already on the app store (in another app) as a test, that triggers the error too... brutal

@eskimo Is that DTS request that you mentioned 747163779? I'm guessing not, but that was meeee. Figured out that -65555 error when asking dns_sd.h to do anything can be fixed by adding NSLocalNetworkUsageDescription and NSBonjourServices to Info.plist.