This is regarding the following error upon trying to authorize payments2us:

Error message:
We can't authorize you because of an Oauth error. For more information, contact your Salesforce Administrator.
OAUTH_APPROVAL_ERROR_GENERIC: An unexpected error has occured during authentication. Please try again.
Solution:
Please follow the steps under “Steps to Install Payments2Us Connected app” in the following article: https://help.payments2us.com/en_US/salesforce-alertsnotifications/salesforce-connected-apps-changes