Actually I have a Report which works perfectly in Power BI Dektop and sometimes it works on the portal too. Currently the Data Source is an Dremio Cluster which is connected over a gateway per direct query. This bug is very annoiing. On the dremio cluster I can see that the Portal communicates with the cluster but for some reason the portal gibe me this error message.
Couldn't load the model schema associated with this report. Make sure you have a connection to the server, and try again. Please try again later or contact support. If you contact support, please provide these details. Activity ID: 4d815ef3-f151-48a7-87ac-2ee2b74e409e Request ID: b65033d4-aee8-42e7-ac1b-1ad160c131f6 Correlation ID: 738ebdfe-aaf0-dccc-c21e-54d91e93d9a1 Time: Mon Jun 01 2020 23:16:09 GMT+0200 (Mitteleuropäische Sommerzeit) Service version: 13.0.13456.212 Client version: 2005.4.01272-train Cluster URI: https://wabi-north-europe-redirect.analysis.windows.net/