Fatal error: Out of memory (allocated 20971520) (tried to allocate 65536 bytes) in /var/www/magento2/vendor/magento/framework/Json/DecoderInterface.php on line 16

Fatal error: Out of memory (allocated 20971520) (tried to allocate 65536 bytes) in /var/www/magento2/vendor/magento/framework/Session/SessionManager.php on line 150

Fatal error: Out of memory (allocated 20971520) (tried to allocate 65536 bytes) in Unknown on line 0

Fatal error: Out of memory (allocated 20971520) (tried to allocate 65536 bytes) in Unknown on line 0