Clickin on media section in admin causes these errors?

You have a faulty plugin. Try installing the Hotfix plugin:
https://www.ads-software.com/extend/plugins/hotfix/

erhmm, its a clean install ??

Then try re-uploading all files & folders from a fresh download of WordPress.

what folders need cmod 777, 755 etc?

Just use 755 for now.

but which ones ??

Leave all folders at 755.

Warning: explode() expects parameter 2 to be string, array given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2390

Warning: in_array() expects parameter 2 to be array, null given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2399

Warning: in_array() expects parameter 2 to be array, null given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2399

Warning: in_array() expects parameter 2 to be array, null given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2399

Warning: in_array() expects parameter 2 to be array, null given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2399

Warning: in_array() expects parameter 2 to be array, null given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2399

Warning: in_array() expects parameter 2 to be array, null given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2399

Warning: in_array() expects parameter 2 to be array, null given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2399

Warning: in_array() expects parameter 2 to be array, null given in /home/monashfl/public_html/wordpress/wp-includes/query.php on line 2399

Warning: Cannot modify header information – headers already sent by (output started at /home/monashfl/public_html/wordpress/wp-includes/query.php:2390) in /home/monashfl/public_html/wordpress/wp-includes/functions.php on line 851

Warning: Cannot modify header information – headers already sent by (output started at /home/monashfl/public_html/wordpress/wp-includes/query.php:2390) in /home/monashfl/public_html/wordpress/wp-includes/functions.php on line 852

same 2 errors on fresh install.. whats happening here?

I am having the exact same issue on several different installs/sites/hosts. It started after one of the more recent WP updates, unfortunately I am not sure exactly when.

Can someone please help pinpoint the culprit? Much appreciated!

https://www.ads-software.com/extend/plugins/hotfix/

using 755 can solve this .