A fatal error has occured during the attempt to resize the "https://wzkaj.poznan.pl/wp-content/uploads/2021/07/WZKaj.png" image.
Possible causes and their solutions (in the order of occurence) are:
/wp-content/uploads/freshizer/
directory does not exist on your webserver.
array(4) { ["type"]=> int(1) ["message"]=> string(80) "Allowed memory size of 268435456 bytes exhausted (tried to allocate 20480 bytes)" ["file"]=> string(116) "/var/www/vhosts/wzkaj.poznan.pl/httpdocs/wp-content/plugins/fresh-framework/framework/extern/freshizer/freshizer.php" ["line"]=> int(283) }