Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class MultiPub_Clean_Admin does not have a method "render_login_footer" in C:\xampp\htdocs\wp-includes\class-wp-hook.php:353
Stack trace:
#0 C:\xampp\htdocs\wp-includes\class-wp-hook.php(377): WP_Hook->apply_filters('', Array)
#1 C:\xampp\htdocs\wp-includes\plugin.php(523): WP_Hook->do_action(Array)
#2 C:\xampp\htdocs\wp-login.php(442): do_action('login_footer')
#3 C:\xampp\htdocs\wp-login.php(1678): login_footer()
#4 {main}
thrown in C:\xampp\htdocs\wp-includes\class-wp-hook.php on line 353