Version: 2.60.5169.4101 64-bit (July 2018)
Region is North America
Created 1 matrix, 1 multi card and 1 text entry in a report using the July version and published. All three visualizations return the same error that is the topic of this thread.
Yes, I'm seeing this as well. Reports created in the July 2018 version of desktop can't pin a visualization, while reports created in an earlier version can pin without issue.
I'm having the same error, but I'm reluctant to remove the report. I've built multiple dashboards from the report source, and I fear that I'll need to rebuild every dashboard if I remove and republish the report. Isn't this true?
Unfortunatelly, this is true. When you remove report and related dataset, all tiles created on this report automatically remove.
I suggest, in such case waiting for updates from support team.