Is anyone else seeing this?
Go into a tags-type agenda, hit "/" to start filtering, then SPC for
"filter to any tag". That gives me this backtrace:
Can you add more detail on how to recreate the problem you are seeing in an emacs -Q session.
I do not use tag filtering heavily, so "tags-type agenda" is not clear to me.
I tried M-x org-agenda, followed by m, followed by / and then SPC. But I do not see that error.