vendor/magento/magento2-functional-testing-framework/src/Magento/FunctionalTestingFramework/_bootstrap.php

Replace:

if (!(bool)$debugMode && extension_loaded('xdebug')) {
    xdebug_disable();
}
By:

if (!(bool)$debugMode && extension_loaded('xdebug')) {
    if (function_exists('xdebug_disable')) {
        xdebug_disable();
    }
}

vendor/magento/magento2-functional-testing-framework/src/Magento/FunctionalTestingFramework/_bootstrap.php

From :-

if (!(bool)$debugMode && extension_loaded('xdebug')) {
    xdebug_disable();
}

To :-

if (!(bool)$debugMode && extension_loaded('xdebug')) {
    if (function_exists('xdebug_disable')) {
        xdebug_disable();
    }
}