Grafana Logs only in Table view visible

Hi guys,

i have a grafana set-up on top of a zabbix server. Zabbix server ist configured as Backend / Data source in grafana. I created a passive agent check in zabbix, which collects all Log information for a specific log file.

I tried to add a widget with the grafana ‘logs visualization’ - but no content is shown. Its simple empty - not even a N/A.
When I switch to ‘Table visualization’ I’m able to see the log information, but this is not what I want.

I changed the log level to debug on the grafana-server, but there are no errors.

Any help is much appreciated,
Thanks in advance!