I'm currently facing an issue with existing Power BI reports for desktop and PBIRS using live connections to a SSAS data source where I get error "An error occurred while loading the model for the item or data source 'QueryUserError'".
The problem appeared after I made some changes to filters and roles via visual studio. I have tried removing the filters without any luck.
I have since upgraded to PBIRS August 2018 with no change. The SSAS dataset works fine as do filters when I open it in excel.
When I open in Power BI Desktop (Aug 2018) it just hangs on the error i mentioned above until i kill the process from task manager. None of my reports using this data model work right now either desktop or PBIRS.