Same error with several different accounts. Worked fine less than 24 hours ago. Also noticed issues with developer.apple.com. Will try again tomorrow.

I am experiencing the same error with Xcode 15.4 on M1 Macbook Pro, but not with the exact same project on a iMac 2019/Intel Core i9...

This is still a problem in iOS 26.0.1. The behavior is significantly different than on iOS 18 and below. Using the new iOS 26 method - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRanges:(NSArray<NSValue *> *)ranges replacementString:(NSString *)string API_AVAILABLE(ios(26.0), tvos(26.0), visionos(26.0), watchos(26.0)); Does NOT resolve the issue as it reports the same WRONG values.