That is an interesting bug. I am afraid I don't have a solution for that issue.
However, here is where I kept the original copy of the plugin. https://tesseract-index.bitbucket.io/pluginsandmacros/hashtag2tag.html -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/26591f12-f53d-417f-a3c1-5cc20d7de51a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.