When it comes to something as revolutionary as gene editing, there is still much progress to be made. Issues will inevitably arise, and of course, they must be fixed. That is the point of progression in science - experimenting, finding an issue, trying to fix it, and experimenting again....and again...and again.
This is a temporary block in the road but I don't think it gives scientists the red light to "stay the living daylight away" from embryo editing. CRISPR has the potential to challenge and change everything that we know about humanity itself.
And (of course) there are a number of ethical dilemmas to second and challenge that, but scientists most definitely need to continue embryo editing and experimentation - they are after all "just" embryos, there's no issue as long that they don't grow them past 14 days and are - as said in the article -"destroyed after the editing experiment". It isn't a final product of any sorts yet, we are only in the beginning stages.
This kind of bio-technology will take decades to fully master and develop. I encourage scientists to keep going. This is human innovation in the making.