I've just tried to connect to our WebDAV server over HTTPS. Unfortunately, I've got an error, while everything seems to be right by starting an unencrypted WebDAV connection. For version 4.4.3 everything worked fine. The system on which I try to connect is hosted by http://all-inkl.com/
The virtual host setup by the hosting provider is misconfigured. It must accept TLS connections with SNI extension. Let the hosting provider know the hostname you are using to connect to and it should either fix their configuration or will let you know a different hostname to use to connect to.
From RFC 3546
A server that receives a client hello containing the "server_name"
extension, MAY use the information contained in the extension to
guide its selection of an appropriate certificate to return to the
client, and/or other aspects of security policy. In this event, the
server SHALL include an extension of type "server_name" in the
(extended) server hello. The "extension_data" field of this
extension SHALL be empty.
If the server understood the client hello extension but does not
recognize the server name, it SHOULD send an "unrecognized_name"
alert (which MAY be fatal).