Jack, I just encountered this too. For me the issue was with the ClearURLs add-on https://addons.mozilla.org/en-US/firefox/addon/clearurls/. Once disabled it, the problem went away. If you don't have that add-on, I would suggest opening the wiki in Private mode and if the issue doesn't replicate in that mode, then start disabling add-ons in regular mode until it goes away.
On Saturday, May 2, 2020 at 2:02:39 PM UTC, Jack Baty wrote: > > Other notes: The cloud icon remains red with the syncing animation running > continuously. Choosing logout from the menu returns a 404 message. > -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/c7c63b59-8de6-43e4-b016-89d473b1b0e0%40googlegroups.com.