NC 11: WebDAV using Windows 7 thru SSL doesn't work

Nextcloud version (eg, 10.0.2): 11.0.0
Operating system and version (eg, Ubuntu 16.04): Ubuntu Server 16.04.1
Apache or nginx version (eg, Apache 2.4.25): nginx 1.10.0
PHP version (eg, 5.6): php7
Is this the first time you’ve seen this error and can you replicate it?:

The issue you are facing:
When trying to connect to the NC-server from Windows 7 thru WebDAV, Windows says “Invalid Folder”. I’m using the link from the NC-manual (which is working fine on Windows 10 and third party software

I’m using a virtual host configuration in nginx to force all communications to be SSL, so I think that will be the problem with Win 7.

Since I don’t want to lower the Server’s security level, is there a solution for this?

The output of your Nextcloud log in Admin > Logging:
no WebDAV-related entries

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

The output of your Apache/nginx/system log in /var/log/____:
no entire’s

SabreDAV has some information about the WebDAV support of different Windows versions:

In your setup you say it is working without SSL? Or is it the redirection itself the problem (e.g. it checks via http, then https and then uses https but it needs http working as well)?

In my setup it’s not possible to connect without SSL.

Since all other Clients, including Windows 10, work fine, and I’ve read on several posts about issues with Win7 and SSL-WebDAV, I guessed thats the culprit.

Your link sound good, however that key does not exist in my registry and importing the whole key as described on that instructions does not work, it says the key is invalid.

It’s works in Windows 10 versión 1809 with BasicAuthLevel in 1 and dont’ exist the key UseBasicAuth.
In Windows 7 Don’t works, i changed BasicAuthLevel in 2 and I created the key UseBasicAuth in 1 and still Don’t Works.