I am working to use MFTF, it went well upto build:project and changes in .env file but when trying to generate tests I am getting ERROR

Undefined index: SampleData in C:\xampp2\htdocs\magento2\dev\tests\acceptance\vendor\magento\magento2-functional-testing-framework\src\Magento\FunctionalTestingFramework\Util\ModuleResolver.php:309

I am using magento 2.2.6. Complete details regarding can be found on :


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