Grafana: "Prometheus DataSource Error" after Ubuntu Apt upgrade of grafana

I've had an instance of Graphana running for 2 years on an Ubuntu box using Prometheus as a data source.

After updating ubuntu via apt I noticed my all my dashboards went down. Going to the Prometheus DataSource settings I see the error Error reading Prometheus: Metric request error

Looking in my apt upgrade log it looks like things broke with the update batch

Upgrade: libglapi-mesa:amd64 (21.0.3-0ubuntu0.3~20.04.4, 21.0.3-0ubuntu0.3~20.04.5),
libgl1-mesa-dri:amd64 (21.0.3-0ubuntu0.3~20.04.4, 21.0.3-0ubuntu0.3~20.04.5), 
grafana:amd64 (8.2.5, 8.3.0), 
mesa-vulkan-drivers:amd64 (21.0.3-0ubuntu0.3~20.04.4, 21.0.3-0ubuntu0.3~20.04.5), 
libglx-mesa0:amd64 (21.0.3-0ubuntu0.3~20.04.4, 21.0.3-0ubuntu0.3~20.04.5)

If I use curl to access Prometheus from the same machine I get results for endpoints like /metrics or api/v1/query. So it appears that Prometheus is working fine.

Also, googling the error message Error reading Prometheus: Metric request error returns zero results. So, not sure what to do here ... roll back the grafana version?

I've also posted a question in the grafana community. https://community.grafana.com/t/prometheus-ds-metric-request-error-new-error-on-upgrading-ubuntu/57443

same thing happened to me wıth promethes. I just added http:// to URL field on prometheus data source page, it worked.

Downgrading from grafana/stable 8.3.0 to grafana/stable 8.2.5 resolves the issue temporarily.

This is using the archive https://packages.grafana.com/oss/deb

However, I also upgraded to 8.3.1 and the package is still broken, so fixing an old version works but isn't an actual solution.

Not sure where to report package issues for https://packages.grafana.com to (besides their community forum).

[update] tried the Ubuntu update grafana/stable 8.3.2 but it still breaks the Prometheus DataSource.