It looks like while updating plugins, an error in the process occurred leaving my website and admin page littered with notice / error messages such as:
Notice: Undefined index: titlecss in /data/xx/x/xx/157/1535483/user/xxxxxx/htdocs/wp-content/plugins/youtube-simplegallery/youtube_simplegallery.php on line 513
Notice: Constant WP_MEMORY_LIMIT already defined in /data/
Notice: Undefined index: cforms_inexclude in /data....
etc etc etc for various plugins, too.
I need to know what's the best route to fixing this ASAP. Very urgent. Thank you for your attention.