No response from license server
If you entered a correct license key but yet an error occurs, there most likely is a problem with the connection between our license servers (license.pdfforge.org) and your computer. Please make sure that there is no firewall or proxy blocking PDFCreator.
PDFCreator Terminal Server users, please see this article: https://docs.pdfforge.org/pdfcreator/latest/en/pdfcreator/installing-pdfcreator/installation-on-a-terminal-server/#licensingserviceconfiguration
PDFCreator Business users, please make sure that you're allowed to connect to our license server at https://license.pdfforge.org.