Post tags not working

Hey all,

I’m sure someone else has has this problem, but for some reason, I can’t add any new tags to any of my posts. I can only choose from the ones I’ve already used…which is fine, if I wanted to repeat myself over and over again. The problem is the input box when writing a post. I can’t add any tags at all. Any suggestions/redirection to other posts about this problem would be greatly appreciated. Thanks!