Are you finding zero results for hashtag searches on Mastodon?
Don't worry, just ignore the numbers and click on the tag you want to see your actual search results!
The numbers appear if you're logged into Mastodon through your server's website.
They say zero for most tags due to a highly misleading interface design.
I've reported this as a bug, if any of you are on Github you can give it a thumbs up so the developers know you want it fixed too: