Error message

Warning: date_timezone_set() expects parameter 1 to be DateTime, boolean given in format_date() (line 2063 of /var/www/clients/client0/web13/web/main/includes/common.inc).
Warning: date_format() expects parameter 1 to be DateTime, boolean given in format_date() (line 2073 of /var/www/clients/client0/web13/web/main/includes/common.inc).
Warning: date_timezone_set() expects parameter 1 to be DateTime, boolean given in format_date() (line 2063 of /var/www/clients/client0/web13/web/main/includes/common.inc).
Warning: date_format() expects parameter 1 to be DateTime, boolean given in format_date() (line 2073 of /var/www/clients/client0/web13/web/main/includes/common.inc).

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