Mktime error message, help…purrwweaassseee

There are 3 errors that are showing up, they all seem to be related.

Warning: mktime() expects parameter 6 to be long, string given in /home/melodiem/hooprevolution.melodieofmovement.com/wp-content/plugins/the-events-calendar/the-events-calendar.class.php on line 1263

Warning: mktime() expects parameter 6 to be long, string given in /home/melodiem/hooprevolution.melodieofmovement.com/wp-content/plugins/the-events-calendar/the-events-calendar.class.php on line 1263

Warning: mktime() expects parameter 6 to be long, string given in /home/melodiem/hooprevolution.melodieofmovement.com/wp-content/plugins/the-events-calendar/views/table.php on line 6

https://hooprevolution.melodieofmovement.com/category/events

help? Puuurrwweaaseee