bdbrown on "[Theme: Hueman] Password protected pages"

Hello,

Are there any known limitations for using password protected pages under Hueman?
When i use PW protection I get following waings:

Waing: call_user_func_array() expects parameter 1 to be a valid callback, function 'mp_post_password_expires' not found or invalid function name in /home/be888/domains/crypto888.be/public_html/wp-includes/plugin.php on line 235

Waing: Cannot modify header information - headers already sent by (output started at /home/be888/domains/crypto888.be/public_html/wp-includes/plugin.php:235) in /home/be888/domains/crypto888.be/public_html/wp-login.php on line 455

Waing: Cannot modify header information - headers already sent by (output started at /home/be888/domains/crypto888.be/public_html/wp-includes/plugin.php:235) in /home/be888/domains/crypto888.be/public_html/wp-includes/pluggable.php on line 1171

Hi Wm. Are you using a plugin for the password protection? Is this something that was working and now is not?
Here's one reference for the "valid callback" error:
http://presscustomizr.com/waing-call_user_func_array-expects-parameter-1-valid-callback/
Here's a reference for "headers already sent":
https://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_waing_problem.3F