[Bug Report] Clicking on tag gives error message

Marenheit Contributor - This little pony contributed to the Marenheit fundraiser of 2020

Amateur Autist
Searching for "red ribbons (character)" works normally, but clicking on the tag gives an error message stating "You can't access that page"

I assumed it was because clicking on the tag tries to send you to https://ponerpics.org/tags/red+ribbons+(character), instead of replacing ( and ) with %28 and %29 like in every other url, but the url still doesn't work when replacing them manually.
Syntax quick reference: *bold* _italic_ [spoiler]hide text[/spoiler] @code@ +underline+ -strike- ^sup^ ~sub~