Error install data sample

[quockhanh91]

Fatal error: Call to undefined method Magento\SampleData\Helper\State::isError() in /Applications/XAMPP/xamppfiles/htdocs/magento2-develop/setup/src/Magento/Setup/Model/SampleData.php on line 89

Are you using the develop branch or the master branch?

[vinhbt90vn]

I had same error. It happens on the develop branch, not on the master branch.

[mazhalai]

@quockhanh91 and @vinhbt90vn sample data is not compatible with develop branch. Please use master branch if you want to use sample data.