We've had a temporary issue with the licensing server, and it is now resolved. Please update your keys now.
Apologies for this.
Thank you for reporting the issue.
Could you please check if the license file is successfully stored in the App_Data\Sitefinity\ directory? If it is not, then it might be a file-access permission issue.
Otherwise, we will be glad to inspect your project locally, and check what the problem might be. Is this an option?