Luke

Hey @hjogiupdraftplus,

I found that we are also having issues with these two plugins. The “Duo Two-Factor Authentication” plugin that you linked in your reply is the correct one. When logging into the admin dashboard with both plugins active, you will receive a “There has been a critical error on this website” error. Disabling the Duo plugin or the All In One WP Security plugin fixes the issue. It seems that there is some kind of conflict.

I believe this is the issue that @kkelley0213 is referring to.

Here are some details from the automated email I recieved:

WordPress has a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, All In One WP Security.

…

Error Details
=============
An error of type E_ERROR was caused in line 678 of the file /home/user/site_url/wp-content/plugins/all-in-one-wp-security-and-firewall/classes/wp-security-user-login.php. Error message: Uncaught Error: Call to undefined function get_active_blog_for_user() in /home/user/site_url/wp-content/plugins/all-in-one-wp-security-and-firewall/classes/wp-security-user-login.php:678
Stack trace:
#0 /home/user/site_url/wp-includes/class-wp-hook.php(324): AIOWPSecurity_User_Login->wp_logout_action_handler(0)
#1 /home/user/site_url/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(false, Array)
#2 /home/user/site_url/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#3 /home/user/site_url/wp-includes/pluggable.php(671): do_action(‘wp_logout’, 0)
#4 /home/user/site_url/wp-content/plugins/duo-wordpress/duo_wordpress.php(212): wp_logout()
#5 /home/user/site_url/wp-content/plugins/duo-wordpress/duo_wordpress.php(274): duo_start_second_factor(Object(WP_User))
#6 /home/user/site_url/wp-includes/class-wp-hook.php(324): duo_authenticate_user(Object(WP_User), ‘username’, ‘password’)
#7 /home/user/site_url/wp-includes/plugin.php(205): WP_Hook->apply_filters(NULL, Array)
#8 /home/user/site_url/wp-includes/pluggable.php(618): apply_filters(‘authenticate’, NULL, ‘username’, ‘password.’)
#9 /home/user/site_url/wp-includes/user.php(106): wp_authenticate(‘username’, ‘passsword.’)
#10 /home/user/site_url/wp-login.php(1311): wp_signon(Array, true)
#11 {main}
  thrown

Thanks!