Image Crop Editor Not working

I faced the same problem and got it solved. This may be a very late response, but can be useful for other people facing this problem. This is how I resolved it:

Check your functions.php file. See, if you have the closing tag at the every end of the file.

?>

removing this tag fixed my problem. Also can check out this link. Hope this helps!

I had the same issue but the problem was missing the GD library, https://www.digitalocean.com/community/questions/installing-the-gd-image-library

To install (Linux/ Apache2):

sudo apt-get update
sudo apt-get install php5-gd
sudo service apache2 restart

This should solve your problem:

• Remove all blank lines and whitespaces in /wp-content/themes/name/functions.php + the including files.
• Remove all blank lines and whitespaces in /wp-config.php file
• Check that php5-gd is installed.
• Permissions changed to 777 for testing /wp-content/upload/ + sub folders
• Remove closing ( ?> ) php tags in /wp-content/themes/name/functions.php + the including files.
• Turn off all plugins.
• Rename your theme and change to default theme.

Keep in mind, the interface is not intuitive and it's easy to forget that the [Save] button is still deactivated if you do the following:

1. Click the crop button.
2. Select the area you want.

You must do the opposite.

1. Select the area you want.
2. Click the crop button.