Advanced monitoring extension error: {“message”:”Invalid username or password”}

Symptoms

• Advanced Monitoring shows this error

  error: {"message":"Invalid username or password"}

• This error appears in any tab of Advanced Monitoring

  

• These entries are logged to /var/log/grafana/grafana.log

  lvl=eror msg="Invalid username or password" logger=context error="Invalid Username or Password"
  lvl=eror msg="Invalid username or password" logger=context error="Too many consecutive incorrect login attempts for user. Login for user temporarily blocked"

Cause

Corrupted process files in the Grafana service.

Resolution

Restart the services to regenerate these process files.

1. Log in to Plesk

2. Restart Grafana in Tools & Settings > Services Management

3. Reload Grafana in Extensions > My Extensions > Grafana > Reload Status

If these steps don't work, reinstall Grafana and Monitoring: How to manage Plesk extensions