The crash was resolved with proper Notes \ Domino version 9.0.1.
I was able to simulate and play around with Domino cipher and notes.ini settings and it is now working properly. I have also updated the Domino server to 9.0.1 and apply patches. But as per checking with https://www.ssllabs.com/ there are still vulnerabilities, it showed that SSLv3 is still working interchangeability that can be exploited if used. I have already updated the latest fixes and added some settings on notes.ini still shows the same case.
Thanks in advance for helping me.