BuddyPress.org

WordPress version: 5.3.2
BuddyPress version: 5.1.2
web server: nginx
Also I am running wordpress in multisite mode.

I am having problems creating buddypress groups:

In wp-admin i can click on “Groups” on the menu. The “Groups” page shows no groups, which is correct. I can click on the “Add New” button which redirects me to “/groups/create/step/group-details/”.

I can fill in step 1 ok, but when i click on the “Create Group and Continue”, it just results in a 404 error. The url doesn’t change either.

If I enable WP_DEBUG, I get the following errors on the following urls:

1) /wp-admin/admin.php?page=bp-groups
Notice: wpdb::escape is deprecated since version 3.6.0! Use wpdb::prepare() or esc_sql() instead. in /var/www/wordpress/public/wp-includes/functions.php on line 4655

Notice: add_submenu_page was called incorrectly. The seventh parameter passed to add_submenu_page() should be an integer representing menu position. Please see Debugging in WordPress for more information. (This message was added in version 5.3.0.) in /var/www/wordpress/public/wp-includes/functions.php on line 4986

Notice: add_submenu_page was called incorrectly. The seventh parameter passed to add_submenu_page() should be an integer representing menu position. Please see Debugging in WordPress for more information. (This message was added in version 5.3.0.) in /var/www/wordpress/public/wp-includes/functions.php on line 4986

Notice: add_submenu_page was called incorrectly. The seventh parameter passed to add_submenu_page() should be an integer representing menu position. Please see Debugging in WordPress for more information. (This message was added in version 5.3.0.) in /var/www/wordpress/public/wp-includes/functions.php on line 4986

Notice: add_submenu_page was called incorrectly. The seventh parameter passed to add_submenu_page() should be an integer representing menu position. Please see Debugging in WordPress for more information. (This message was added in version 5.3.0.) in /var/www/wordpress/public/wp-includes/functions.php on line 4986

Notice: add_submenu_page was called incorrectly. The seventh parameter passed to add_submenu_page() should be an integer representing menu position. Please see Debugging in WordPress for more information. (This message was added in version 5.3.0.) in /var/www/wordpress/public/wp-includes/functions.php on line 4986

2) /groups/create/step/group-details/
Notice: wpdb::escape is deprecated since version 3.6.0! Use wpdb::prepare() or esc_sql() instead. in /var/www/wordpress/public/wp-includes/functions.php on line 4655

Please help.