502 Bad Gateway nginx/1.10.3

Hi everyone.

I elgg web site works perectly on local server.

But when I move under online server I have the following error only during user account creation and user account deletion. I check my apacher log and nginx log. nothing in my logs. 

error is displayed on the following url when creating user account (https://xxx.xxxx.xx/action/useradd)

        502 Bad Gateway 


I dont know what's wrong.

Best regard


Beginning Developers

Beginning Developers

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