Bug when uploading/moving images

I press add new image I choose where I want to add it from my desktop/previous uploads then it uploads the image and then I get prompted for tags I write something in the caption section and when I press save it starts loading then I get an error at the top saying (An error happened, check back later) so I have to refresh and press edit tags to edit captions. It's not a big deal I just wanted to mention it.