I have no access to my menu.
I am using the template Prolingua which I customized as well as wordpress. Here is the error message :
add_submenu_page is called the wrong way. The seventh parameter passed to add_submenu_page() should be an integer representing a menu position. Please read Debugging in WordPress for more information. (This post was added in version 5.3.0.) in /home/onanatraol/www/wp-includes/functions.php on line 4986
So what do I have to do to settle this very annoying problem? Step by step please.
Thanks in advance