My guess is that PS is opening the file in 16 bit mode, which JPEG won't support. You need to knock it down to 8 bits before you can save it as a jpg. Click on Image -> Mode -> 8 Bits/Channel. Also make sure the image in flattened.
My guess is that PS is opening the file in 16 bit mode, which JPEG won't support. You need to knock it down to 8 bits before you can save it as a jpg. Click on Image -> Mode -> 8 Bits/Channel. Also make sure the image in flattened.