Not exactly sure why, but previously I was able to add tags to my pages / posts. Now I can't, whenever I click on the tag box to write one nothing happens (as in no text field exists but it's still very much there).
Even posts with tags previously show nothing in that text box when editing the page, but on the frontend the post is still tagged. It's particularly odd since I've made no changes to the installation (no upgrades, adding plugins, themes, etc).
Any ideas where I start to figure out what's gone wrong and fix it ?
Edit : I'm on Version 1.6.0 in a shared hosting envrionment