503 service temporarily nginx unavailable

ey, The Last few day Websites server down the issue. It happens many times a day. Because of this issue, both sites 1: https://shaw-speed-test.ca 2: https://pistolzone.com are facing the same problem, and also my site’s user experience compromise. Please guide me, this issue is related to my hosting or Cloudflare. Screenshot attached

All three sites load for me through LAX.

For any site that’s not working, please send us the output of that site’s https://example.com/cdn-cgi/trace

but minus the line with your home IP address.