I am getting error in magento 2 product import. In admin panel, navigate System->Import and try importing the sample csv file. On clicking 'check data', it shows no error, then when I click on 'Import', the page gets freezed. Loader keeps moving as screen below.
Did you found some error on your browser console?
What about the Magento logs (system, debug or excpetion) and the webserver error log?