Matching the version of Desktop with Report Server

You need to use a PBI Desktop install that is aligned with the SSRS version. There were 3 releases of the SSRS Server June17, Oct17 and now March18. Each has a Desktop installer associated with it.

You were using June17-SSRS-Desktop with the Oct17-SSRS-Server which worked fine.

Now you have updated to the Feb18-Cloud-Desktop version you are experiencing version problems.

I would probably suggest you uninstall your Feb18 version and download the Oct17-SSRS-Desktop or earlier (I can't seem to track down a URL for this) I can see the "current" March18 version but not any older versions. Might be useful to have access to these.

If you're really stuck I have the 64bit installer for Oct17-SSRS-Desktop I could DropBox it to you.

Unfortunately MS have a bit of form when it comes to comaptability issues in the early versions of stuff. Its understandable as features and just getting it working take precedence. The challenges of supporting this stuff operationally over the long term always take a while to appear. The operational stuff rarely gets prioritised until it's really dire. MS are not alone in this its all about the race for features in software these days.

Unfortunately we're in the painful growing phase where changes to the product are big and too frequently break stuff. It is alas the price of being quite so close to the cutting edge. 

It's fun in a tightrope walk over a pit of tigers with the tightrope on fire kind of way.