Wp-Cerber Bug I found on my Site.

I am using wp-cerber. After login by entering username and password a “””Verify it’s you
We’ve sent a verification PIN code to your email n????????????????@?????.com
Enter the code from the email in the field below.””” Window opens. All goes well till here.

But when I press the “””Did not receive the email? Try again or Cancel”””
TRY AGAIN button, It gives me the following error:-

Fatal error: Uncaught Error: Call to a member function get_page_permastruct() on null in /home/f45345/domains/webpagespots.com/public_html/wp-includes/link-template.php

/home/f45345/domains/webpagespots.com/public_html/wp-includes/link-template.php(197): get_page_link(Object(WP_Post), false, false) #2 /home/f45345/domains/webpagespots.com/public_html/wp-content/plugins/userswp/includes/class-templates.php(422): get_permalink(Object(WP_Post)) #3 /home/f45345/domains/webpagespots.com/public_html/wp-includes/class-wp-hook.php(303): UsersWP_Templates->wp_login_url(‘https://webpage…’, ‘https://webpage…’, false) like error so. I have changed here the actual “f45345” for security.

Can anybody help to overcome this fatal error in wp-cerber.????

The page I need help with: [log in to see the link]