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After updating to wordpress 5.3 this error keeps showing up on my dashboard page
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 /home/mushabi/public_html/wp-includes/functions.php on line 4986
Warning: Cannot modify header information – headers already sent by (output started at /home/mushabi/public_html/wp-includes/functions.php:4986) in /home/mushabi/public_html/wp-includes/functions.php on line 6029
Warning: Cannot modify header information – headers already sent by (output started at /home/mushabi/public_html/wp-includes/functions.php:4986) in /home/mushabi/public_html/wp-admin/includes/misc.php on line 1252
Warning: Cannot modify header information – headers already sent by (output started at /home/mushabi/public_html/wp-includes/functions.php:4986) in /home/mushabi/public_html/wp-admin/admin-header.php on line 9
How should I fix it?