Please follow the steps below.
First of all, update your WHMCS system.
2nd, backup your theme/style folder and files before applying updates. Mainly, backup the header.tpl, footer.tpl and custom.css files.
3rd, update the template and replace your backuped header.tpl, footer.tpl and custom.css files.
By the way, WHMCS team also updated head.tpl in WHMCS version 7.2.2. You will get the changes in the changelog1.6.txt
Please check out carefully the changelog1.6.txt
to update the template.
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Changelog included in “documentation/changelog” (folder).
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Best Regards,
ThemeLooks Support Team