[No find schedules on the website]

Hello, I have a problem on my site because when I go to "Pilot Center" and after "View Flight Schedules", I don't see schedules but an error message

Strict Standards: Accessing static property Schedules::$post as non static in/var/www/alternc/y/yes01/www/infinitiairlines.kappatau.fr/core/modules/Schedules/Schedules.php on line 28

Strict Standards: Accessing static property Schedules::$post as non static in/var/www/alternc/y/yes01/www/infinitiairlines.kappatau.fr/core/modules/Schedules/Schedules.php on line 178

Strict Standards: Accessing static property Schedules::$post as non static in/var/www/alternc/y/yes01/www/infinitiairlines.kappatau.fr/core/modules/Schedules/Schedules.php on line 183

Strict Standards: Accessing static property Schedules::$post as non static in/var/www/alternc/y/yes01/www/infinitiairlines.kappatau.fr/core/modules/Schedules/Schedules.php on line 188

Strict Standards: Accessing static property Schedules::$post as non static in/var/www/alternc/y/yes01/www/infinitiairlines.kappatau.fr/core/modules/Schedules/Schedules.php on line 193

Thanks for your help and sorry for my english !