Warning: Undefined array key "account" in /var/www/html/index.php on line 8

Fatal error: Uncaught TypeError: Defr\QRPlatba\QRPlatba::setAccount(): Argument #1 ($account) must be of type string, null given, called in /var/www/html/index.php on line 8 and defined in /var/www/html/src/QRPlatba.php:220 Stack trace: #0 /var/www/html/index.php(8): Defr\QRPlatba\QRPlatba->setAccount(NULL) #1 {main} thrown in /var/www/html/src/QRPlatba.php on line 220