Ticket details form is enabled.
This can also happens on version v1.15.4.
The script is dying at due date field when it is set to null and language is PL Polish.
When I set the due date field for the ticket, the page renders normally.
I've found this error in php log:
[Thu Jan 20 10:25:43.109621 2022] [proxy_fcgi:error] [pid 24562:tid 140093713020672] [client 94.72.126.14:0] AH01071: Got error 'PHP message: PHP Warning: DateTime::modify(): Failed to parse time string (Poniedzia\xc5\x82ek 2022-01-18) at position 0 (P): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 802\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (Poniedzia\xc5\x82ek 2022-01-25) at position 0 (P): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 837\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (Wtorek 2022-01-18) at position 0 (W): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 802\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (Wtorek 2022-01-25) at position 0 (W): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 837\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (\xc5\x9aroda 2022-01-18) at position 0 (\xef\xbf\xbd): Unexpected character in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 802\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (\xc5\x9aroda 2022-01-25) at position 0 (\xef\xbf\xbd): Unexpected character in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 837\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (Czwartek 2022-01-18) at position 0 (C): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 802\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (Czwartek 2022-01-25) at position 0 (C): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 837\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (Pi\xc4\x85tek 2022-01-18) at position 0 (P): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 802\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (Pi\xc4\x85tek 2022-01-25) at position 0 (P): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 837\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (January 2022 Third Poniedzia\xc5\x82ek) at position 13 (T): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 802\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (January 2023 Third Poniedzia\xc5\x82ek) at position 13 (T): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 837\nPHP message: PHP Warning: DateTime::modify(): Failed to parse time string (last Poniedzia\xc5\x82ek of May 2022) at position 0 (l): The timezone could not be found in the database in /home/taernsite/domains/support.taern.com/public_html/include/class.schedule.php on line 802\nPHP message: PHP Warning: Date', referer: https://support.taern.com/scp/