Erreur appel API

[tguenneguez]

We have error of display rule on a grafana :
t=2022-06-02T11:41:04+0200 lvl=eror msg="Request Completed" logger=context userId=4 orgId=1 uname=lwpm0368 method=GET path=/api/prometheus/10/api/v1/rules status=503 remote_addr="XXXX, 127.0.0.1" time_ms=2 size=33 referer=https://.... Truncated]

I try to call : /api/prometheus/10/api/v1/rules
The error message is :
{"message":"unexpected backend type (marcusolsson-csv-datasource)"}

Have you got an idea of the reason.

Thanks
Thomas