Did you find a solution? Dealing with exact same on macOS after upgrading to Big Sur 11.3. Seems like a Swift framework error. The workaround mentioned did not work for me.

I am dealing with the exact situation with no resolution from Apple. App worked just fine (macOS parent-detail view type app), and then I upgraded to Big Sur 11.3, and it broke it. Now clicking the parent NavigationLink gives me "unable to present" error and the behavior is absolutely erratic when I try to nail down any issue. Wasted hours only to find out others are having similar issues. I haven't found a workaround, and the app is dead for users with 11.3. Really frustrating.

I'm having similar issues but in macOS! Updating to macOS 11.3 w/ Xcode 12.5 messed up my existing app which worked just fine in previous versions. How is it that Apple hasn't fixed this. update: tried the EmptyView() and it doesn't help. Clicking the navigation link still leads to a "unable to present, please file a bug" error. Frustrating.

If anyone else comes here: The solution proposed by stakes worked for me on macOS BigSur.

Hi @Claude31 - yes, for my purposes I need to be able to load entire text files. It is supposed to be a "Text Editor" so I was hoping they had done basic performance tests against it. It certainly seems to be doing something wonky with every keystroke (I am not doing anything - haven't attached any listeners). I will raise a bug, thank you. Hopefully they'll improve the text editor with more capabilities and better performance soon.

I figured out the issue. The culprit was a forced Swift try! which failed. It was working on my dev account because the folder/file being read from existed but didn't in other accounts. Hard lesson learned. The crash logs, debug symbol all turned out to be useless in indicating where the issue was.

@Etresoft - thank you! That is heartening. I've done some more digging. I think the biggest one that I haven't found an answer to is (a) can I automatically create folders within the security-accessed folder and (b) can I launch a background process that could access my project folder (and its internals) Is there a good recent swift code or article - I can't seem to find something my newbie mind can handle.