cPanel proxy subdomain's 503 and 500 error

[vacancy]

Hello there

After updating to version 11.64 build 22, the proxy subdomains not to work.

whm.domain.com
webmail.domain.com
etc.

When I returned to version 11.64 build 21, the problem was solved.

 

[cPanelMichael]

Hello,

Could you let us know of any output to /usr/local/apache/logs/error_log or /usr/local/cpanel/logs/error_log when you encounter the issue?

Thank you.