Notice: Undefined index: url in /var/www/webroot/ROOT/index.php on line 52

Fatal error: Uncaught TypeError: Argument 1 passed to HeadlessChromium\Page::navigate() must be of the type string, null given, called in /var/www/webroot/ROOT/index.php on line 52 and defined in /var/www/webroot/ROOT/vendor/chrome-php/chrome/src/Page.php:177 Stack trace: #0 /var/www/webroot/ROOT/index.php(52): HeadlessChromium\Page->navigate(NULL) #1 {main} thrown in /var/www/webroot/ROOT/vendor/chrome-php/chrome/src/Page.php on line 177