Open EMR Registration problem

Situation
I am facing problem while trying to registration in patient portal. It’s showing There was a problem registering you. Recommend contacting clinic for assistance. this message. I have configured the backend perfectly and added the SMTP configuration.

My system was working fine. But, from the last day it’s showing this message and registration process is not working.

OpenEMR Version
7.0.0 (2)

Browser:
I’m using: Firefox, Chrome, Internet Explorer.

Operating System
I’m using: Ubuntu 20, Windows 10, Fedora.

Search
Yes, I did not found any relevant solution.

Logs

FYI, This message is showing at the last step.