This is bug in WHMCS. If you enable domain from Setup > Domain and do not really activate any domain reseller and add domains for sell it will show
rror: Call to a member function getButtonClass() on string in /home/username/whmcs-data/templates_c/f77c12c517430aa77542683587a376d15e9e3ad2_0.file.domainregister.tpl.php:73
Hi
I added this code in header and custom.js. It was working well but it has stopped working suddenly. I am using whmcs 7.8.3. I have not updated or made any chnages since it first time I set it and worked. Can anyone help? Here is the link https://www.vishalkumar.com/whmcs/