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Troubleshooting SLS download and installation

This page details how to troubleshoot common download and installation errors in Sophos Linux Sensor (SLS).

Download errors

"error": "Unauthorized" when trying to generate the SLS package repository API token.

SLS isn't available with evaluation licenses. Your Sophos Central account must have one of the following qualifying product licenses:

  • Intercept X Advanced for Server with XDR
  • Intercept X Advanced for Server with MTR Standard
  • Server E Intercept X Advanced for Server with MTR Advanced
"error": "BadServerResponse" when trying to generate the SLS package repository API token.

SLS needs API credentials created by a SuperAdmin in a Sophos Central Admin dashboard. Ensure the configuration is done in a Sophos Central Admin dashboard and not in a Partner or Enterprise dashboard.

The repository 'https://packages.sophos.com/sophos-linux-sensor/release stable InRelease' is no longer signed.

Your SLS package repository API token is expired. You must generate a new token. See Generate a SLS package repository API token.

Installation errors

Zero policies configured

SLS default detection content isn't installed. You must install both SLS and the default content for detections and alerts to function. See Install Sophos Linux Sensor.