I get the same error only while debugging. When I run on device it runs for a while then crashes.

I do not have 18.1 Beta 6.

I don't know if this will help or not but: Running the app on the Simulator pops up an message:

Have you made any progress on this? I too am seeing these errors after updating to Xcode 16, IOS 18, and macOS 15.0

Upgrading from Xcode 15 to 16.0 (16A242d) IOS 18. Now I get error: the replacement path doesn't exist: "/variable/folders/....swift" <- this error is green. Then: Publishing changes from background threads is not allowed; <- this error is red. The app worked fine in IOS 17.7 and Xcode 15

Thank you.

This does NOT help: extension Double { func rounded(digits: Int) -> Double { let multiplier = pow(10.0, Double(digits)) return (self * multiplier).rounded() / multiplier } }