Uncaught Error: Call to a member function

Hello i have problem with one of my contact form. I see this error log:
“Fatal error: Uncaught Error: Call to a member function get_status() on null in /home/customer/www/website.com/public_html/wp-content/plugins/contact-form-7/includes/contact-form.php:768 Stack trace: #0 /home/customer/www/website.com/public_html/wp-content/plugins/contact-form-7/includes/controller.php(25): WPCF7_ContactForm->submit() #1 /home/customer/www/website.com/public_html/wp-includes/class-wp-hook.php(290): wpcf7_control_init() #2 /home/customer/www/website.com/public_html/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(NULL, Array) #3 /home/customer/www/website.com/public_html/wp-includes/plugin.php(551): WP_Hook->do_action(Array) #4 /home/customer/www/website.com/public_html/wp-includes/class-wp.php(388): do_action_ref_array('parse_request', Array) #5 /home/customer/www/website.com/public_html/wp-includes/class-wp.php(750): WP->parse_request('') #6 /home/customer/www/website.com/public_html/wp-includes/functions.php(1291): WP->main('') #7 /home/customer/www/website.com/public_html/wp-blog-head in /home/customer/www/website.com/public_html/wp-content/plugins/contact-form-7/includes/contact-form.php on line 768”

The error pops up after I click SUBMIT on one of the forms, interestingly, I have other forms of this type and I have no such problems there. Can you show the way to find the error?
Thanks!