I updated my iPhone 13 pro to ios 15.6.1 and now the RingCentral iOS app doesn't open. When I tap the app icon a transparent rectangle pops up and then fades out, not opening the app. I deleted the app and reinstalled. I also restarted my phone. The app still doesn't open. I was able to open the ios app this am before updating. Once i updated to ios 15.6.1 the app doesn’t open.

The ios update was only a security update, so not sure what happened.