"Datasource XXXXXX Not Found" PowerBI Refresh issues

Hi tobiaskay ,

Please check if adding "Hosting-databaseValidationStatus" could fix the issue:

1. Backup the config.json file (usually located in "C:\Program Files\Microsoft Power BI Report Server\PBIRS\RSHostingService\config.json") ;

2. Edit the config.json file and add this in the AS section (make sure to add the comma): 

"name": "AS", 

            "launcher":"AnalysisServices", 

            "path": "ASEngine\\msmdsrv.exe", 

            "Config": 

            { 

                "Workspaces.path": "ASEngine\\workspaces", 

                "restartOnChangesTo": "Hosting-databaseValidationStatus,ASPort,Workspaces.path" 

            } 

3. Save the config.json file and restart the Power BI Report Server service.

Best Regards,

Icey

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.