There are two ways to troubleshoot any problem while using CyberPanel.
There is an global error log file (this file only contains logs generated by CyberPanel). This file can be reached at
If you can not find anything reasonable using the first way, then open your command-line terminal and run
journalctl -f | grep gunicorn
After running this command, go back to CyberPanel and do the same thing causing issues, and then come back to terminal and capture the output.
Find errors in email problems
If for some reason your emails are not going through, you can use below commands to capture output and get to the bottom of the issue:
journalctl -f | grep postfix(For email delivery issues)
journalctl -f | grep dovecot(For issues related to Rainloop Webmail)