WebDAV problem in nextcloud 14.0.3

[rootbdfy]

Steps to reproduce

1. Login to nextcloud, copy webdav url.
2. Type webdav url in "map network drive" window (testing in Win10, Win8.1 and Win7)
3. Get "network error" message
   

Expected behaviour

I expected that all work fine.

Actual behaviour

Error.

Server configuration

Operating system:
Debian Stretch & on other installation same problem - Debian Buster
Web server:
nginx
Database:
pgsql & on other installation mysql
PHP version:
7.0.30 & 7.2
Nextcloud version: (see Nextcloud admin page)
14.0.3
Updated from an older Nextcloud/ownCloud or fresh install:
Updated from owncloud -> nextcloud 10,11,12,13 -> 14.0.1 - 14.0.3
Where did you install Nextcloud from:
from download page
Signing status:

Signing status

Login as admin user into your Nextcloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results here.
No errors have been found.
</details>

**List of activated apps:**
<details>
<summary>App list</summary>

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your Nextcloud installation folder

Enabled:
  - accessibility: 1.0.1
  - activity: 2.7.0
  - admin_audit: 1.4.0
  - audioplayer: 2.4.1
  - bruteforcesettings: 1.1.0
  - calendar: 1.6.2
  - cloud_federation_api: 0.0.1
  - comments: 1.4.0
  - contacts: 2.1.6
  - dav: 1.6.0
  - federatedfilesharing: 1.4.0
  - federation: 1.4.0
  - files: 1.9.0
  - files_pdfviewer: 1.3.2
  - files_sharing: 1.6.2
  - files_texteditor: 2.6.0
  - files_trashbin: 1.4.1
  - files_versions: 1.7.1
  - files_videoplayer: 1.3.0
  - flowupload: 0.0.8
  - gallery: 18.1.0
  - logreader: 2.0.0
  - lookup_server_connector: 1.2.0
  - nextcloud_announcements: 1.3.0
  - notifications: 2.2.1
  - oauth2: 1.2.1
  - password_policy: 1.4.0
  - provisioning_api: 1.4.0
  - serverinfo: 1.4.0
  - sharebymail: 1.4.0
  - support: 1.0.0
  - survey_client: 1.2.0
  - systemtags: 1.4.0
  - theming: 1.5.0
  - twofactor_backupcodes: 1.3.1
  - updatenotification: 1.4.1
  - user_ldap: 1.4.0
  - workflowengine: 1.4.0
Disabled:
  - encryption
  - files_accesscontrol
  - files_clipboard
  - files_downloadactivity
  - files_external
  - firstrunwizard
  - ocsms
  - spreed
  - spreedme
  - tasks
  - user_external

</details>

**Nextcloud configuration:**
<details>
<summary>Config report</summary>

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

or

Insert your config.php content here.
Make sure to remove all sensitive content such as passwords. (e.g. database password, passwordsalt, secret, smtp password, …)

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "nextcloud...",
            "cloud...",
            "cloud...",
            "cloud..."
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/cloud.pst-labs.ru",
        "dbtype": "mysql",
        "version": "14.0.3.0",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "Europe\/Moscow",
        "installed": true,
        "loglevel": 2,
        "maintenance": false,
        "trashbin_retention_obligation": "auto",
        "updater.release.channel": "stable",
        "theme": "",
        "singleuser": false,
        "mail_smtpmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": 25,
        "mail_smtpauth": false,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "ldapProviderFactory": "\\OCA\\User_LDAP\\LDAPProviderFactory",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "forwarded_for_headers": [
            "HTTP_X_FORWARDED",
            "HTTP_X_FORWARDED_FOR"
        ],
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "filelocking.enabled": "true",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0
        },
        "updater.secret": "***REMOVED SENSITIVE VALUE***"
    }
}

</details>

**Are you using external storage, if yes which one:** local/smb/sftp/...
no
**Are you using encryption:** yes/no
no
**Are you using an external user-backend, if yes which one:** LDAP/ActiveDirectory/Webdav/...
LDAP
#### LDAP configuration (delete this part if not used)
<details>
<summary>LDAP config</summary>

With access to your command line run e.g.:
sudo -u www-data php occ ldap:show-config
from within your Nextcloud installation folder

Without access to your command line download the data/owncloud.db to your local
computer or access your SQL server remotely and run the select query:
SELECT * FROM oc_appconfig WHERE appid = 'user_ldap';

Eventually replace sensitive data as the name/IP-address of your LDAP server or groups.

</details>

### Client configuration
**Browser:**

**Operating system:**
Win7, Win8.1, Win10
### Logs
#### Web server error log
<details>
<summary>Web server error log</summary>

Insert your webserver log here

</details>

#### Nextcloud log (data/nextcloud.log)
<details>
<summary>Nextcloud log</summary>

Insert your Nextcloud log here

</details>

#### Browser log
<details>
<summary>Browser log</summary>

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...

</details>

[nextcloud-bot]

GitMate.io thinks possibly related issues are #11818 (Nextcloud 13.0.6 upgrades to wrong version.... (14.0.3) caused webdav issues...), #3738 (Webdav), #11821 (Nextcloud 14.0.3 dont start after Update postgresql 10), #9170 (redirect), and #8241 (image).

[rootbdfy]

Solved by
net stop WebClient
net start WebClient

[rootbdfy]

Solved by
net stop WebClient
net start WebClient

[rootbdfy]

Still no luck with win10.

[skjnldsv]

windows have known issues with dav, please check the documentation, it have been updated a lot lately :)