Hey guys,
I have a similar problem. I can't upload images bigger than 3 MB to my site. The error message says, "The server can't process the image. This can happen if the server is busy or doesn't have enough resources. Uploading a smaller image might work. The maximum suggested size is 2,560 pixels." You can see my PHP configuration here: https://www.rockstarauctionhouse.com/info.php.
My host is aws ec2 instance and the server has a 1 core Intel(R) Xeon(R) CPU E5-2676 and a lot of swap memory. I found that the issue happens only when I try to upload images larger than 3 MB. Smaller images upload fine. But this shouldn't be happening, right? I have tried out everything discussed in this chart. Doesn't work.
Thanks in advance