My problem described in the title.
But in addition, I have set in the next directiory C:\OpenServer\modules\yarn Yarn and I don't know what to do next.
I hope for your help because I didn't find anything on Google or in the net.
I found it! Yeh!
We need to change in settings on the 'server' tab one option and create a file that will say which programs OpenServer must get and prefetch.