I just noticed after upgrading my instance a few days ago that the chart plugin doesn’t render anymore. You can see on this post that there are large blank sections where the charts used to be but don’t show anymore.
I had a draft post in the works too that was using charts and that’s broke as well. I’ve tried updating everything, permissions under /var/discourselook fine, and there’s plenty of disk space, so I’m not sure what to look at next.
Thank you for the bug report. However, the discourse-chart plugin is not an official plugin and is not something we provide support for at the moment, and it is likely in a broken state.