Facebook Ads Problem - Unable to generate preview

I'm having facebook ads problem, whole day.

When I try to make and use Desktop News Feed, I'm getting
"Unable to generate preview" message for mobile news feed "Sorry, something went wrong".

Anyone else experiencing same issues?

Yea, it's random error. I seen it many times. Just ignore and submit anyway, works fine. You just can't see preview but audience will see it as they should.