Why is the desktop app unable to connect to nTop's license server?


After installing, changing passwords, or logging out, a sign-in prompt will display when starting the software. Some users may encounter the message:

Unable to connect to nTop's license server. Please contact your IT department and have them review the Licensing Quick Start Guide above.

Applies to:

  • nTop
  • Cloud Licensing


There are a few reasons the login screen may display this error message.

  • Security settings are blocking the software from contacting our database.
  • An unstable internet connection is preventing the software from communicating with us.


The user's organization may need to allowlist nTop servers or adjust security settings. Please review the following articles for assistance:

If the issue persists, we may need to connect with your IT department to fix the problem.

More on this topic:


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