Fixes #15174 - make sure to return 404 when taxonomy not found
(cherry picked from commit 3e05c127986cca0d3b53341a93e16d0c55d0840e)
Fixes #15174 - make sure to return 404 when taxonomy not found
(cherry picked from commit 3e05c127986cca0d3b53341a93e16d0c55d0840e)