Can't edit/create an exhibit

Seong_Lee / 2019-02-19 03:40:35   

Hi, I'm working on my website seonghaklee.com

but at some point, it dose not let me edit. when I click edit,

the page chages to "This page isn’t working seonghaklee.com is currently unable to handle this request.
HTTP ERROR 500" Page.

could anybody help me on this?

thank you

This thread has been closed, thank you.