We have a page with a roadmap planner on it that had been working just fine but just started displaying this error instead of the roadmap:
Error rendering macro 'roadmap' : java.io.IOException: Invalid character
I see this same error if I view earlier versions of the page. Nothing seems amiss when I edit the page, and publishing a change doesn't seem to help.
One piece of information: there are emoji in the roadmap bar titles. Still, this has apparently been working fine, but I thought I'd point that out.
It seems like something must have changed with the macro. Has anyone else seen this?