I encountered an issue: I am using GLPI version 10.0.18. When I installed the Metabase plugin version 1.3.3 and my Metabase version is 0.55.10, the installation and connection to Metabase were successful. I also assigned the necessary permissions so that the dashboards should be visible. However, when I go back to the homepage and access the Metabase dashboards, nothing is displayed even though the connection was successful. and when i see php log error on glpi notice error Unauthorized
Sounds like there is still a permissions issue with the user that GLPI is using to access Metabase with.
Can you get ANY data to display in GLPI from Metabase? Can you try setting up a dashboard using the Sample Database with the user given Admin rights?
What is the URL that is getting bounced with the 403?