Power BI Semantic Model refresh issues

Hi,

Looks like you may have a gateway and that gateway may be offline - maybe restart the gateway and that usually solves the issue.

General tip for gateways is that you need to restart it everytime you make a change to a Power BI report and publish it.

Also, if that isn't the issue, the next thing I'd do, is download the report as a pbix and then try the refresh in desktop - usually you'll get a more descriptive error message there. If your refresh works fine, then it's most likely an issue with credentials within the service or a gateway. If the refresh doesn't work, then open Power Query Editor and see which query is failing and fix it. Common reasons for the query breaking is when columns are removed or renamed in the source and you're referencing them in steps.

Hope that helps.