Image upload error

I am getting the below error when I try to upload images into WordPress. The size of this file is JPEG image – 246 KB. I have to send the image files to a co-worker who has no issues uploading the same image files into WordPress media.
Error message:
‘The server cannot process the image. This can happen if the server is busy or does not have enough resources to complete the task. Uploading a smaller image may help. Suggested maximum size is 2560 pixels.’