I was waiting for some updates but none of them solved this problem on my sites. The error log is full of this:
PHP Notice: Undefined index: HTTP_HOST in ... password-protected.php on line 390
PHP Warning: Cannot modify header information - headers already sent by (output started at ... password-protected.php:390) in ... wp-includes/pluggable.php on line 1340
PHP Warning: Cannot modify header information - headers already sent by (output started at ... password-protected.php:390) in ... wp-includes/pluggable.php on line 1343
I was waiting for some updates but none of them solved this problem on my sites. The error log is full of this: PHP Notice: Undefined index: HTTP_HOST in ... password-protected.php on line 390 PHP Warning: Cannot modify header information - headers already sent by (output started at ... password-protected.php:390) in ... wp-includes/pluggable.php on line 1340 PHP Warning: Cannot modify header information - headers already sent by (output started at ... password-protected.php:390) in ... wp-includes/pluggable.php on line 1343