Recently I am using Cloudflare on my site. And I add the following rule to bypass the cache for WHMCS system, as below:
Yesterday, it seems that everything is fine. And this morning, I can still login WHMCS at https://www.datanumen.com/customer/admin/login.php but due to some inactivities, I am logged out.
Thereafter, I cannot login any more. After inputting the login details and click “Login” button, the page will be refreshed and continue display the login page with the two edit boxes. I try many times, and all fails.
How to solve this issue?