Dashboard variable DataSourceVariableSupport not supported

[GuYounes]

I have a custom data source plugin using DataSourceVariableSupport. I can see my query editor, but when I click on "Run query" it silently crashes.
In createQueryVariableRunner.ts in the function createQueryVariableRunnerFactory we can see that the DataSourceVariableSupport is not supported.

[apricote]

Same here. My data source was working properly until Grafana 11.3.0 where it now fails with this error message for my DataSourceVariableSupport variables.

SceneVariableSet updateAndValidate error Error: Couldn't create a query runner for datasource apricote-hcloud-datasource
    g_ createQueryVariableRunner.js:113
    getValueOptions QueryVariable.js:73
    RxJS 5
    Angular 18
    RxJS 16
    _updateNextBatch SceneVariableSet.js:127
    _validateAndUpdateCompleted SceneVariableSet.js:145
    next SceneVariableSet.js:128
    RxJS 8
<anonymous code>:1:145535
    overrideMethod <anonymous code>:1
    _handleVariableError SceneVariableSet.js:161
    error SceneVariableSet.js:130
    RxJS 8
    Angular 18
    RxJS 16
    _updateNextBatch SceneVariableSet.js:127
    _validateAndUpdateCompleted SceneVariableSet.js:145
    next SceneVariableSet.js:128
    RxJS 8

• My data source: https://github.com/apricote/grafana-hcloud-datasource/blob/main/src/datasource.ts
• My ǛVariableSupport: https://github.com/apricote/grafana-hcloud-datasource/blob/main/src/variables.ts