Turn on WP_DEBUG to display your specific error message by adding:
define( ‘WP_DEBUG’, true );
To the top of your wp-config.php file.
Post the error message you see here and we might be able to fix it.
I got this message:
Notice: Undefined variable: file in /home/yseop/www/blog/wp-content/plugins/fix-my-feed-rss-repair/rss-feed-fixr.php on line 14
Warning: Missing argument 2 for wpdb::prepare(), called in /home/yseop/www/blog/wp-content/plugins/category-icons/category_icons.php on line 1047 and defined in /home/yseop/www/blog/wp-includes/wp-db.php on line 1154
Notice: wpdb::prepare was called incorrectly. The query argument of wpdb::prepare() must have a placeholder. Please see Debugging in WordPress for more information. (This message was added in version 3.9.) in /home/yseop/www/blog/wp-includes/functions.php on line 3370
Warning: Missing argument 2 for wpdb::prepare(), called in /home/yseop/www/blog/wp-content/plugins/category-icons/category_icons.php on line 1338 and defined in /home/yseop/www/blog/wp-includes/wp-db.php on line 1154
Notice: wpdb::prepare was called incorrectly. The query argument of wpdb::prepare() must have a placeholder. Please see Debugging in WordPress for more information. (This message was added in version 3.9.) in /home/yseop/www/blog/wp-includes/functions.php on line 3370
These are errors from other plugins. Turn them off and try again