i have this error showing up in syslogs “open /var/log/php8.2-fpm.log: permission denied”
welcome to the 
community @rudigo6
Did you get any error logs in /var/log/grafana/grafana.log ?
Try increasing the verbosity of the Grafana server logs to debug and note any errors. For printing to console, set the console logs to debug as well.
Also please include:
Grafana version and operating system:
What were you trying to achieve before you caught the error?