i have a similar problem, with curious twist...
CORS is for cross-domain import, so I don't think that applies to
local files.
For me, I can't import tiddlers to a 2.6.5 TW downloaded from
tiddlwiki.com, BUT I can import tiddlers to a
TW - which also self reports as 2.6.5 - downloaded from
tiddlyspace.com.
There's a lot less iconography in the
tiddliwiki.com template, so I'm
thinking about going back to it.
Any ideas on the apparent asymmetry? I would have expected to be able
to import to any 2.6.5 TW from any other 2.6.5 TW?
Thanks, Andrew