setTime issue
[07-Sep-2018 23:47:00 Europe/Paris] PHP Fatal error: Uncaught Error: Call to a member function setTime() on boolean in /web/create_date_poll.php:148 Stack trace: #0 {main} thrown in /web/create_date_poll.php on line 148
I'm getting this problem when creating an event poll. PHP is 7.1.21, OS is CentOS7. Are there any solutions?