This is really bizarre, but for whatever reason when I have Contact Form 7 activated on my site, I can no longer add categories in WP. And this goes for ANY part of WP that has categories - Like using Woocommerce for example.
I've spent hours and hours trying to figure out the problem after having disabled every other plugin except Contact Form 7. I disabled it now I'm able to add categories. If I enable and try again it doesn't even try it seems.
However, what I did find was that if I hit refresh after a failed attempt to add a category, it actually shows up. So I'm baffled. Is it a browser issue? I tried it in both Safari and FF on Mac (latest on both).
Ideas other than ditching it?