Https not fully working

I have my own SSL attached to my domain.

It working perfectly and mostly http request diverting to https perfectly.

However for few links I observed its not working

like

https://www.gstseva.com/gst-online-help-forum-ask-question-forums/

If I remove “S” from above it stop working and SHOWS ERROR 502.

Please suggest a solution domain is www.gstseva.com

I just checked your domain, and it is not passing Cloudflare server (the A/AAAA/CNAME record is grey-clouded). Please contact your hosting provider to solve this issue.