Fatal error when adding event

Hi, I’m getting a fatal error when I try to publish a new event. Can you please advise how to fix?

See details below:

Error Details

=============

An error of type E_ERROR was caused in line 461 of the file /home/ginews/public_html/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php. Error message: Uncaught Error: Call to a member function format() on bool in /home/ginews/public_html/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php:461

Stack trace:

#0 /home/ginews/public_html/wp-content/plugins/eventon-lite/includes/admin/eventon-admin-functions.php(176): eventon_get_unix_time()

#1 /home/ginews/public_html/wp-content/plugins/eventon-lite/includes/admin/post_types/class-meta_boxes.php(475): evoadmin_get_unix_time_fromt_post()

#2 /home/ginews/public_html/wp-content/plugins/eventon-lite/includes/admin/post_types/class-meta_boxes.php(593): evo_event_metaboxes->event_save_datetime()

#3 /home/ginews/public_html/wp-includes/class-wp-hook.php(326): evo_event_metaboxes->eventon_save_meta_data()

#4 /home/ginews/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()

#5 /home/ginews/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()

#6 /home/ginews/public_html/wp-includes/post.php(5110): do_action()

#7 /home/ginews/public_html/wp-includes/post.php(5212): wp_insert_post()

#8 /home/ginews/public_html/wp-admin/includes/post.php(453): wp_update_post()

#9 /home/ginews/public_html/wp-admin/post.php(227): edit_post()

#10 {main}

  thrown