No access to datasource after system upgrade

I am running 9.2.0 on Debian buster.

I have a few dashboards connected to an influxdb that were working.

After a recent update the infuxdb seems to be working. (Unfortunately, I have no idea if Grafana was updated in the process…)

But, the dashboards produce the following error:

Object
message:"InfluxDB Error: Bad Request"
data:Object
message:"Authentication to data source failed"
error:"Bad Request"
response:"Authentication to data source failed"
config:Object
method:"GET"
url:"api/datasources/proxy/1/query"
params:Object
data:null
precision:"ms"
inspect:Object
paramSerializer:serializeParams(e){…}
headers:Object
retry:0
hideFromInspector:false

I’m a bit lost as to how to trouble shoot this. I’m guessing the upgrade either lost the previous authentication details or the authentication process has changed.

Can someone point me in the right direction?