I created a ticket from osticket web interface, and there are some of them which unable to open with a timeout error.
I checked the apache log, and it's flooded with an error message like this:
[Fri Nov 20 09:36:19.166932 2020] [php7:warn] [pid 545] [client 192.168.7.1:14327] PHP Warning: DateTime::modify(): Failed to parse time string (P\xc3\xa9ntek 2070-11-04) at position 1 (\xef\xbf\xbd): Unexpected character in /var/www/html/include/class.schedule.php on line 802, referrer:
PHP Warning: DateTime::modify(): Failed to parse time string (January 2089 Third H\xc3\xa9tf\xc5\x91) at position 13 (T): The timezone could not be found in the database in /var/www/html/include/class.schedule.php on line 802, referer:
Any idea where can I find the solution for this?