Fatal error

I just updated my WordPress platform and tried updating the Ninja plug-in, but now I can’t even login to my dashboard.

I’ve tried to in both Firefox and Chrome and I’ve cleared my cookies/cache.

This is the error I’m receiving when I try to few my dashboard:
Fatal error: Call to undefined function ninja_forms_register_tab() in /home/content/s/w/a/swartz5522/html/wp-content/plugins/ninja-forms-layout-master/includes/admin-layout.php on line 30