[bug] WebDav access 403

[owpk]

I've configured Filestash server (available at http://example.com:8334) and a local WebDav server (i use rclone launched with command rclone serve webdav "/webdav" --baseurl "/" --addr "127.0.0.1:8080" --user "user" --pass "pass" and available at http://example.com:8080), I try to connect to my WebDav with the filestash login page and get the error:

http://example.com:8334/api/session 403 
{"status":"error","message":"Not Allowed"}

i use no proxy and any stuff like this, any ideas what's wrong?