Wordpress Theme Options – not saving changes [RESOLVED] [FIXED]

The problem is their WP_MEMORY_LIMIT low.

The solution is to increase your WP_MEMORY_LIMIT by following the steps below:

1. You will need to access your WordPress folder ( folder where you installed WordPress )
2. Open wp-config.php
3. Right after the first line, add these two lines of code:

define( 'WP_MEMORY_LIMIT', '128M' );
set_time_limit(400);

4. Save the changes (and re-upload the file)