Path proxy SFTPGO to server/webdav

Traefik Traefik v2
1

please help me set up the proxy to the address correctly http://server/webdav or http://server.local/webdav . I have a local server, access is only via LAN and tailscale.
This is my config:

http:
  routers:
    webdav:
      entryPoints:
        - web
      rule: "PathPrefix(`/webdav`)"
      service: webdav
      middlewares:
        - "stripprefix-webdav"

  middlewares:
    stripprefix-webdav:
      stripPrefix:
        prefixes:
          - "/webdav"

  services:
    webdav:
      loadBalancer:
        servers:
          - url: "http://10.10.11.1:1080"

Some clients do not connect to the server.

2

Enable and check Traefik debug log and Traefik access log.

3 
100.100.10.18 - - [25/Jul/2024:08:07:32 +0000] "PROPFIND /webdav/backup HTTP/1.1" 401 67 "-" "-" 1 "webdav@file" "http://10.10.11.1:1080" 347ms
100.100.10.18 - - [25/Jul/2024:08:07:32 +0000] "PUT /webdav/backup/SafeInCloud.tmp HTTP/1.1" 401 67 "-" "-" 2 "webdav@file" "http://10.10.11.1:1080" 366ms

SafeInCloud says authorisation error

4

HTTP 401 "Unauthorized" indicates you need to supply credentials, usually in the HTTP header (doc).

5

but I enter all logins and passwords correctly, the server does not accept authorization.

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if I connect via the IP address and port (http://10.10.10.10:1080/), it connects normally.