Hello.
I wrote Whcms and they checked and that’s what they wrote:
Hello,
To test this issue further, I added ?systpl=six to the end of the URL. This will force WHMCS to use the stock Six template we ship with a fresh installation. When WHMCS loads this template, everything works correctly which indicates your issue is a result of a custom or out of date template.
https://domain.ge/register.php?systpl=six
To resolve this issue, you will need to contact your template developer and ask them to ensure WHMCS is updated for the version of WHMCS you are running. Each time we release a new version of WHMCS, we make a note in our Release Notes of any changes to our stock templates.
You may find a copy of our Release Notes located here: https://docs.whmcs.com/Release_Notes
For your reference, you can also view the specific Changelog for the Six template here: https://github.com/WHMCS/templates-six/commits/master
Best regards,
.
