Issue opening Ipad & iPhone Obsidian app

Things I have tried

Searched your help section for topics on IOS /iCloud syncing.

I can’t open my main vault in my IOS & iPad os devices… It gives me an error message that can’t open obsidian “events reminders task.md icloud” is invalid. I have tried to go into my files app to delete files but there is one file which I can’t delete as it doesn’t exist! I have uninstalled app and reinstalled but not working

What I’m trying to do