Oracle oci logsdatasource error collecting logs 1.1.0 reject: too many failed attempts: status":500

Hi guys, I am succesfully collecting metrics, but I fail collecting logs in my CentOS7 VM in Oracle OCI. No Idea where to start troubleshooting any hints. In grafana explorer I selected the region for eu-frankfurt-1 and some basic queries. below the error . thanks.

Error:reject: too many failed attempts: {“status”:500,“statusText”:“Internal Server Error”,“data”:{“message”:“Metric request error”},“config”:{“url”:“api/tsdb/query”,“method”:“POST”,“data”:{“from”:“1604566628674”,“to”:“1604570228674”,“queries”:[{“environment”:“OCI Instance”,“datasourceId”:2,“queryType”:“searchLogs”,“refId”:“A”,“type”:“timeserie”,“searchQuery”:“no search query given”,“region”:“eu-frankfurt-1”}]},“retry”:0,“headers”:{“X-Grafana-Org-Id”:1},“hideFromInspector”:false}}