You might see license-related errors if you cannot connect to the WHMCS license server or there is a misconfiguration in your system.
If you experience problems with MarketConnect landing pages, promotions, or provisioning, it may be due to misconfigurations or other issues.
Make sure to troubleshoot and resolve any issues with payment gateways, payments, currencies, or related features as soon as possible.
WHMCS runs on PHP code and requires several PHP extensions in order to function normally. If there is a problem with PHP on your server, you will experience problems in many areas of WHMCS.
You may experience problems while configuring products for sale, during the purchase process, or when managing individual clients' purchased services.
Some provisioning and server-related issues are due to misconfiguration in your WHMCS installation, while others may be due to networking issues or other server-side problems.
You will see SSL-related errors if the SSL certificate for your WHMCS installation is missing, misconfigured, or out-of-date, or if there are connection issues.