Facing this error while tried to update whmcs from 7.6.1 to 7.7.1. Update Failed An error occurred that prevented the update from completing successfully. A fatal error occurred while fetching the update.
Please check to make sure your memory limits and execution time are set to the recommended values. I have a memory limit set to 256M and max execution time set to 600. I have tried multiple times but didn't help. How I can fix this issue?