When adding datasource, I get "Error reading InfluxDB" . Can I get more info?

I tried connecting to both my localhost and my influxb cloud 2.0 db.
Both get the same error. Where can I find the logs or more information on what actually goes wrong? I find this too little feedback to come to a solution…

I’ve tried about all possible variation of settings to get it to work, but keep getting this error.

you can check the network tab of your browser’s dev tools while testing the query. You can also increase the verbosity of grafana’s server logs to debug: