Usage for hash tag: post

I’ve tried removing the (#post) part etc and many other configurations but always says invalid

...your Build Thread badge. If you've tried attaching it in your account but badge isn't showing up, then try taking off that last bit starting #post - example - use this for yourself instead: https://www.reef2reef.com/threads/all-in-on-new-redsea-reefer-300-g2-build.967583/ If 'attaching it in...