Hello, we are using the March 2018 version of Power BI Report Server and Power BI Desktop. When we log in to PBIRS and click the "Edit in Power BI Desktop" option for a report, Power BI Desktop opens and presents this message: "Unable to open document Unexpected error encountered".
Hello, I don't know if this will help you or not, given the late response. I had a similar issue with our PowerBI Report Server, but it became active after disabling TLS 1.0. WHen left only with TLS 1.2 we could no longer: a) acces an already existing report in PowerBI reportServer b) uplod a new report using PowerBI report server upload butto c) save a report to desktop using PowerBI Desktop Version d) upload a new report to PowerBi report Server using power BI desktop. I have to mention that both PowerBi Report Server and PowerBi Destopk were the March 2018 edition. So we got help from Microsoft. Turns out that this is an .net Framework issue. It seems that if you use a .Net Framework higher than 3.5 you have to manually create some registration keys
For your case you should see what TLS version you have enabled.
Resolution: We solved the problem by adding two registry keys SchUseStrongCrypto and SystemDefaulTlsVersion. These keys are used during Report Services communication but not part of any direct code within the Reporting Services product. The TLS/SSL communication occurs within the Operating System negotiation between client and server. Any application installed on the server can make use of these new keys. In client side, the keys are supported and part of the .NET Framework 3.5 patches but are not forced to be enabled so they need to be enabled/updated where needed. WHat we did:
1) Open Regedit
2) go to the following paths(see bellow) and add the encryption keys. You need to add them in the latestes .NetFramework version folders. In total you will have to add 4 reg keys: 2 for the SYSTEMDEFAULTTLSVERSIONS and 2 for the SCHUSESTRONGCRYPTO