What does it mean when the 'Invalid License' pop up appears on the page?
I am sorry that the answer you got before was misleading - it was generated by an AI that has no understanding of your question or Atlassian software.
The popup means what it says - you have given your system a licence that is not right for the app or application you are licencing.
You will need to check your application licences and your app licences - the "manage" functions in the admin menus will highlight any unlicensed things you have.
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