Hello, the issue isn't easy to fix so it might take some time.
— PrestaShop (@PrestaShop) April 16, 2018
This is for sure a priority & the team is still working on it. We'll keep you posted as soon as it's fixed.
Again, we apologize for the inconvenience.
https://goo.gl/EO0ad1
https://goo.gl/xF8heB