And the first problem could be a lot of things, this alpha wasn't tested very much as was made on an early version of XenForo. "Loading..." should mean it has uploaded the image and is loading the image into the browsers cache before showing it to you.
Next version sees a lot of code refactoring and a more finished product that I can support. I have had barely any time to get my work done so haven't been able to finalize the beta (it only needs permissions added and a couple functions finished). I am almost done with a couple clients so should have a lot more spare time soon. This week if possible, if not the second week of April.