Website hosted in Plesk shows error 502 in the browser: AH01071: Got error

Started by Suhitha, Sep 10, 2025, 07:22 AM

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Suhitha

Question: Website hosted in Plesk shows error 502 in the browser: AH01071: Got error 'Primary script unknown'


Applicable to:

  • Plesk for Linux


Symptoms

  • Website displays the error 502 Bad Gateway.


  • Under domain logs /var/www/vhosts/example.com/logs the following error can be found
:

[proxy_fcgi:error] [pid 17521:tid 140525340448512] [client 35.181.112.20:0] AH01071: Got error 'Primary script unknown'

  • Plesk utility plesk repair fs returns domain incorrect ownership.
# There is incorrect ownership on some items in the WWW root directory
of the domain 'example.com' ............................................ [ERROR]


Cause

Incorrect domain file permissions.


Resolution

1. Connect into the server via SSH

2. Fix the domain permissions with the following Plesk utility:

# plesk repair fs example.com -y
If issue is present on several domains, execute the following command instead:

# plesk repair fs -y