Thank you friends.
Today I did a whole lot of merciless deleting having faith that
whatever is systemic shall be restored. It went well. I found that
even when the log showed: error saving, forbidden, it replaced the
tiddler with system-default tiddler (I think/if I remember correctly)
A funny thing was I deleted ViewTiddler! and Lord Be Praised I lost
access to view of tiddlers! That was a wow moment! I started giggling
instead of panicking.
I then downloaded another of my tiddlyspaces to a local TW and then
uploaded the file to the broken space though backstage import tab, and
chose just the ViewTiddler to upload. So the crisis was ended. But it
was a good learning thing.