I was getting the same error message when trying to publish my PBI reports to PBI Report Server. However, when I downgraded my PBI desktop (optimised for Report Server) to match the Report Server version so in my case uninstalling my desktop version (March 2018) then installing Oct 2017) this did the trick and I was able to publish successfully without any issues.
The other option is to obviously upgrade the Report Server to the latest version (or to match your desktop version) but this should be tested first on non-production systems and it's easier to test locally first before messing with servers.
Hope this helps,
we encountered the same issue.
Version of server : August 2018
Version of PBI Desktop RS : August 2018
We can open and save paginated reports on server, but can't open nor save PBI reports on server.
On log, stricly nothing appears !!
Only a "Unexpected error encountered" when trying to save report.
I try of course all tips provided (change account, ...) but nothing works.
I have the same issue with the August 2018 release.
Power BI Desktop: 2.61.5192.641 64-bit (August 2018)
Power BI Report Server: 1.3.6816.37243 (August 2018)
The errors are:
1) Save as: "An error occurred while attempting to save the report to Power BI Report Server"
2) Upload any file from PBIRS: "There was an error uploading your .pbix file. Verify that the file has not been corrupted and that the file extension matches the format of the file."
I can see an error in the logs: "Unable to connect to the remote server", which I guess may refer to the ReportServer database. However, I can create new folders from PBIRS. It does not seem to be a SSAS issue, as I get the same errors deploying or uploading a report with just text.
Any ideas welcome, other than just using Azure.
I´m facing the same problem with the January 2019 release.
Both versions, the Desktop and the PBI RS are the same version.
Unable to save PBIX from desktop to server and uplod PBIX to server as well.
Any idea how to fix it?