For each installation and update where you have created a new HTTPS certificate, you have to adjust the BVQ datasource within the Grafana.

Additionally for each installation and update where you have changed the port number for the Grafana server, you have also to adjust the BVQ datasource within the Grafana.

Open your Grafana with the Grafana button, a new tab will open up and login to Grafana using the default BVQ-Credentials, here

Open the Configuration menu and click on Data source,
the installed Data source plugins are listed,
click on BVQServer to move to the specific Data source.

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The BVQ Data Source is shown and can be adjusted.

For adding the certificate,
you only need to activate "With CA Cert"
and paste the certificate text to "CA Cert", shown here
(You can also find the self-signed certificate by default here: C:\Program Files\SVA\BVQ\bvq-core\cert)

For changing the the port number, adjust the entry in "URL".

Click on "Safe & Test" to adjust the data source.