Some of the php errors:
[Tue May 25 08:00:31.046484 2021] [php7:warn] [pid 3757] [client 192.168.10.10:65455] PHP Warning: DateTime::modify(): Failed to parse time string (Dilluns 2021-06-02) at position 0 (D): The timezone could not be found in the database in /var/www/osticket/include/class.schedule.php on line 802, referer: http://192.168.28.13/osticket/scp/index.php
[Tue May 25 09:59:23.983181 2021] [php7:warn] [pid 6894] [client 192.168.10.47:51471] PHP Warning: DateTime::modify(): Failed to parse time string (Dimarts 2021-06-17) at position 0 (D): The timezone could not be found in the database in /var/www/osticket/include/class.schedule.php on line 837, referer: http://192.168.28.13/osticket/open.php
[Mon May 24 18:35:05.406985 2021] [php7:error] [pid 6524] [client 192.168.10.47:59296] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/osticket/include/class.schedule.php on line 832, referer: http://192.168.28.13/osticket/scp/index.php
There are many other errors in open.php on generating and closing
The ticket is created by the client but the page return sometimes to error 500.
The mail is send with succes and the ticket is generated but the agent couldn't open it.