I am getting "The URL was fetched, but nothing was rendered" error in PageSpeed Inisghts, consistently over a few days.
It's a new website.
Every other tool I tried says there's nothing wrong:
- GTMetrix shows PageSpeed 99%, YSlow 90%
- Pingdom gives it 91
- WebPageTest.org gives it AAAAB
- Lighthouse on my PC gives it 85, no errors
Why is PageSpeed unable to render it and how do I troubleshoot this?