Set_time_limit - what does Matomo want?

The system check wants me to change the set_time_limit value. This is done by changing max_execution_time. What should I put in there and why doesn’t Matomo recognize my changes? Matomo is installed on a Lightspees server. Regardless of whether I set max_execution_time to 0 or 640, this is marked in the system check. What else should I do?