Broke after try to add new link

Hi I was using this plugin for time ago but now I having this error when try to add a new link:

Fatal error: Uncaught Error: Call to a member function show_navigation() on null in /home/abogados/public_html/wp-content/plugins/mts-url-shortener/admin/views/url-shortener-edit.php:35 Stack trace: #0 /home/abogados/public_html/wp-content/plugins/mts-url-shortener/admin/class-url-shortener-admin.php(537): include_once() #1 /home/abogados/public_html/wp-includes/class-wp-hook.php(308): MTS_URL_Shortener_Admin->link_edit_page_content(”) #2 /home/abogados/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(”, Array) #3 /home/abogados/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /home/abogados/public_html/wp-admin/admin.php(259): do_action(‘enlaces-cortos_…’) #5 {main} thrown in?/home/abogados/public_html/wp-content/plugins/mts-url-shortener/admin/views/url-shortener-edit.php?on line?35