Got it. The default filename for the 5.1.12 has spaces in the local html file. I removed the spaces, and there is no error when I create a new tiddler, type in "test3" and click the save button.
So there you go, spaces in the filename are a problem. -- 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/f21e9477-117e-410d-99a3-462e0aec4478%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.