Maybe this is the result of rawgraphs.io not incorporating some change on their end, but https://gerrit.wikimedia.org/r/#/c/wikidata/query/gui/+/355593/ does not seem to work as it ought to.
When I go to, for example, http://w.wiki/3XL and run the query, clicking 'link' -> 'open in rawgraphs.io' drops you at this form http://wikidata.rawgraphs.io/?url=/ with no url entered. Instead, to get the data into rawgraphs I must clck 'code' on the wikidata query page, make sure 'url' is selected, and copy-paste the link into the form.
Task
For now we will remove the link until such a time that it is fixed.