Only Questions with Answers return 500 server error for without logged in users and have an answer in question?

Question

Issue: Questions which have answers return a 500 internal server error for not logged in users. When i move website to another server to upgrade from 7.4 to 8.1 php and this will happen.

My traffic dropped please give me a solution.

All questions without answers are running fine, I have selected pretty URLS (site.com/1/question) while everything else stays same.

Note: Site was working all fine for logged in user?

Answer 1

Problem Solved.... By Disabling Captcha Plugin Under Admin Menu?

My site was down lasted for two days, I am not aware of it, but when i check adsense earning, i check the website and found that website is not publically accessible.