The "fix," changing your default browser to Chrome, works! It's not a good fix, but at least I can get to the app. It is ridiculous that there are so many comments here about the issue and not one response from PNC. The app is critical, since you can't use Zelle from a PC. I have been a PNC customer for about 10 years, and generally satisfied, but this last year the service has really gone downhill.