While it is rare to have issues with WHMCS during the initial installation and configuration process, it does happen. Generally, when you encounter a blank page problem within WHMCS, it means that the server has encountered some errors, and those errors have been hidden from visitors for security reasons.
Please follow the step-by-step process outlined below that will provide you with a guide on how to enable errors to be displayed within your browser, rather than facing a blank page
If you’re able to access your admin area:
If you’re unable to access your admin area:
$display_errors = true;
Once the testing has been completed, please make sure you disable these above-mentioned features, to ensure that you maintain the security of WHMCS.
If you have any further questions pertaining to your WHMCS license, please feel free to get in contact with our web hosting support team.