Same problem here! For me it works when I build an Archive and upload to testfilght. But local build for iOS device brings the signing error. I have it signed since I had it done since years - I did not change anything! It worked till a few weeks ago. Apple? Hello? PLEASE HELP! I have to deploy a security update!!!

same here. I did the same thing as 2 years ago. I use a php script with gdlib to create images. They are the same as last time (with new content of course). It´s uploading and then all turn into red -error!