NetworkError while creating a MySQL-Datasource


could someone help please?
I’m new with grafana and tried to create a mariadb-data source.
Mariadb works from remote and localhost, with dbeaver client and all ist fine. Grafana is installed on the same machine (raspberry pi).
But if i try to create a datasource in grafana webgui there is a networkError

  • What Grafana version and what operating system are you using?
    Grafana v8.3.6 (bf8766bbf)

  • What are you trying to achieve?
    Creating a new Datasource from MariaDB (same raspberry pi like the grafana-server)

  • How are you trying to achieve it?
    The Standard way to create a datasource from the web-gui.

  • mariadb → Access works from the remote computer
  • Access with dbeaver from the remote computer works
  • What happened?
  • when trying to create the data source in grafana → “NetworkError when attempting to fetch resource.”
  • triple checked credentials
  • Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.
    “NetworkError when attempting to fetch resource.”

Hello :wave: and welcome to the forum, @seelenmann

First, I would inspect your browser’s developer console, and especially the network tab. See if it outputs anything when you try to test and save the data source. Then I would increase the logging verbosity in Grafana and inspect your logs for errors: