Page Properties Report Macro shows error when used on dashboard

We use RefinedWiki and want to place a Page Properties Report Macro on our dashboard.
This leads to the following error:
"Error while fetching page properties report data: Bad Request"

I disabled RefinedWiki and placed the page properties report macro in the "Welcome Message"-Site. That leads to:
"The page properties report macro must be used within a space."

My assumption is, that the second error is the reason for the first one - and I wonder, if this restriction of the Page Properties Report Macro could be removed.