As of October 7th, 2021: the website cannot run anymore due to deprecated code.
I do not have the necessary time or resources to maintain the vCPDLC up to current code standards.
Therefore, the service is now discontinued officially. Many thanks to the numerous divisions that used it for several years.
I can only suggest to use the official IVAO CPDLC tool in Aurora as well as the Hoppie CPDLC system for pilots.