Hi HDragos,
From the error message, the msdn license for Enterprise 2010 is not valid.
You could upgrade again in central administration to check if it can work.
And you could check if the SharePoint 2010 administration service running under a domain account. For more detailed information, you could refer to the article below.
How to: Convert SharePoint standard license to Enterprise license in SharePoint 2010.
http://www.sharepointpals.com/post/How-to-Convert-SharePoint-standard-license-to-Enterprise-license-in-SharePoint-2010
More references:
Upgrade from a SharePoint Server 2010 Standard CAL to an Enterprise CAL.
https://technet.microsoft.com/en-us/library/cc261946(v=office.14).aspx
Config.xml reference (SharePoint Server 2010).
https://technet.microsoft.com/en-us/library/cc261668(v=office.14).aspx
Best regards,
Sara Fan
TechNet Community Support
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