Sorry to hear you are having “The branch ‘main’ in stream 6b5e89387c has no commits” error. We have seen this error being reported previously. They were using speckle.xyz (our old web app) and upgrading to app.speckle.systems (new web app) solved it for them.
Possibly you have multiple Power BI Desktop folder, possibly in One Drive and Power BI picks that one instead of the other (the one under Documents), or the other way around. You can try the steps described here: