Facebook Login not working with WordPress 5.9

Hey there,

Facebook Login within WordPress 5.9 gets interrupted by admin-ajax.php giving: Internal Server Error 500 within browser console.

Upon taking a look at PHP errors I get:

Uncaught Error: Call to undefined function wp_get_current_user() in …/wp-includes/capabilities.php:892

That file leads to function is_super_admin() apparently being called too early.

So I searched occurrences of is_super_admin() across my theme and all plugins and found this within CleanTalk 5.171, file “cleantalk.php”…

function apbct_is_user_enable($user) {
// must not call: is_super_admin()
}

Complete, working quick fix:

function apbct_is_user_enable($user = null)
{
    global $current_user;

    $user = $user !== null ? $user : $current_user;

    # was: return ! (apbct_is_user_role_in(array('administrator', 'editor', 'author'), $user) || is_super_admin()  );
    return ! (apbct_is_user_role_in(array('administrator', 'editor', 'author'), $user) );
}

Just wanted to put this out here for everyone getting the same issue and provide a quick way to fix.

Next update of CleanTalk should fix this please. However, thank you for this great plugin.

Warm regards
Erik