The Hostname format is invalid


latest whmcs version, it gives an error hostname.

WHMCS Version 7.8.2

Remove the https:// then it should work

I already tried that. But /api because it does not accept

Your whmcs does not allow our api url. so you need to change it manually from database.
Find the tblservers table from whmcs database and change the hostname. you can do it with phpMyAdmin.

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