Tiddlyspot is in recovery mode due to some technical issues.
March 26, 2021
"Save to web" should be working again.
Creating new Tiddlyspot sites is not supported. You can, however, create new sites on Tiddlyhost, which is a new, improved replacement for Tiddlyspot. For more information see this announcement and the FAQ.
See tiddlyspot.blogspot.com for more details and for the latest updates.
Thank you for your patience and messages of support.