I just downloaded a new version of WordPress 4.5.2 and started developing a theme but when I transferred it to the live I cannot upload images on the Post's featured thumbnail same as well on the Media Library.
When I try to upload an image on the Post's featured thumbnail I always got this error:
I have changed the file permission to 777 on /wp-content/uploads/, switch themes and disabled plugins but it still not working.
Any ideas from you guys would be great!
Thanks in advance.
There can be more then 1 reason for this issue.