Why am I getting this error in Server?

PDF Creator Server is telling me I need to get a license, even though I'm licensed until May 15 2018.

image

Hi,

sorry for the trouble. The license is still valid, but your activation expired. This happens if PDFCreator Server can’t contact our license server license.pdfforge.org for more than a week. According to our license server, you were able to successfully activate offline in the meanwhile, do you still need assistance on this topic?

Best regards

Robin