Website not working due to Application error

My website is not working. It shows
Application error
An error occurred in the website and your page could not be displayed. If you are the website owner, check your logs for details.

I just submitted an article and after that i am getting this error. Nothing available in log and it is empty.

Please help me to resolve this problem.

My website :

Try this please

I have tried the above one, still i don’t see any log and getting Application error 500