by Juan Leyva.
Hi Nikos,
unfortunately, this seems to be a local problem in your server.
Our tests, statistics and monitoring says that the server is working as expected
You should verify that your CURL PHP extension and installation is updated and support signed certificates, please contact your system administrator.
One tip: we recently changed the IP Address of the server and the Certificate was renewed, maybe the problem is with some type of cache or similar
Juan