1903 is stable. I installed it on my laptop and desktop. It's working fine without any issue.
I never got any BSOD even when I was running the insider build of 1903.
Coming to your issue:
the system was requesting a page of memory to continue working, but the page was not available and the Windows operating system could not continue the processes it was running. It then crashed, returning the PAGE FAULT IN NONPAGED AREA Blue Screen of Death error as a result.