You can close this. Thanks for your help!
Thanks Nikko,
Is this an incompatibility with WordPress or my plugin Profile Builder? Will this be fixed in a future version? Am I stuck on 4.2.6?
Hi Nikko,
I do not get a 500 error. It just breaks the front end upload functionality. The upload button does not open the window.
My server is already up to date on all software including PHP. Our memory limit is already greater than 256.
The upload worked on 4.2.6. I also tested changing themes. Switching to another theme, the upload does work again so I do believe the cause is something that changed on 4.3. I am now running 4.3.1, the upload still does not work.