Man I understand your frustration. I received an android update and vyom stopped working, tried re-registering but it failed. Somehow the bank guy de registered devuce and gave me a new token.
PSU banks try to stay away from digital banking to justify jobs. They will go out of their way to make mobile/net banking un usable as much as they can. They complained when the computers first came and it goes to this day. SBI's recent update would have cause at least 30-40% of sbi customers to loose access to Yono app.