May I know whether you get this issue when you refresh your report based on OData data source?
Which connector did you use to create your report? Did you use OData Feed connector?
To refresh it, did you configure gateway for it?
Could you please download your report from Power BI service(app.powerbi.com) and open it in Power BI Desktop? After that, check the Applied steps in Power Query Editor(Enter it by clicking on Transform Data) to see whether there is any errors? In addition, please try to refresh this report in Power BI Desktop to see whether it can be refreshed successfully?
Community Support Team _ Caiyun