Giving up after 5 attempts. BackendException: Bad status code 200 reason OK.

[L0RE]

When i make a Backup With Duply (Duplicity). It works

Using installed duplicity version 0.6.21, python 2.7.5+, gpg 1.4.14 (Home: ~/.gnupg), awk 'mawk 1.3.3 Nov 1996, Copyright (C) Michael D. Brennan', bash '4.2.45(1)-release (x86_64-pc-linux-gnu)'.
Autoset found secret key of first GPG_KEY entry 'XXXXXX' for signing.
Test - Encrypt to 88E30CC3 & Sign with XXXXX (OK)
Test - Decrypt (OK)
Test - Compare (OK)
Cleanup - Delete '/tmp/duply.17059.1400099642_*'(OK)

--- Start running command PRE at 22:34:03.210 ---
Skipping n/a script '/root/.duply/www/pre'.
--- Finished state OK at 22:34:03.223 - Runtime 00:00:00.012 ---

--- Start running command BKP at 22:34:03.234 ---
Using archive dir: /root/.cache/duplicity/duply_www
Using backup name: duply_www
Import of duplicity.backends.ftpsbackend Succeeded
Import of duplicity.backends.botobackend Succeeded
Import of duplicity.backends.u1backend Succeeded
Import of duplicity.backends.sshbackend Succeeded
Import of duplicity.backends.gdocsbackend Succeeded
Import of duplicity.backends.hsibackend Succeeded
Import of duplicity.backends.tahoebackend Succeeded
Import of duplicity.backends.rsyncbackend Succeeded
Import of duplicity.backends.ftpbackend Succeeded
Import of duplicity.backends.imapbackend Succeeded
Import of duplicity.backends.webdavbackend Succeeded
Import of duplicity.backends.cloudfilesbackend Succeeded
Import of duplicity.backends.localbackend Succeeded
Using WebDAV protocol http
Using WebDAV host webdav.opendrive.com port None
Using WebDAV directory /web-server/
Reading globbing filelist /root/.duply/www/exclude
Main action: inc
================================================================================
duplicity 0.6.21 (January 23, 2013)
Args: /usr/bin/duplicity --name duply_NAME --encrypt-keyXXXX --sign-key XXXX --verbosity 5 -v5 --exclude-globbing-filelist /root/.duply/NAME/exclude / webdavs://USER@HOST/DIR
Linux SERVERNAME 3.11.0-20-generic #35-Ubuntu SMP Fri May 2 21:32:49 UTC 2014 x86_64 x86_64
/usr/bin/python 2.7.5+ (default, Feb 27 2014, 19:37:08)
[GCC 4.8.1]
================================================================================

UNTIL:

WebDAV PUT /web-server/duplicity-full.20140514T144621Z.vol83.difftar.gpg request with headers: {'Connection': 'keep-alive', 'Authorization': 'Basic STRING'}
WebDAV data length: 26271796
WebDAV response status 200 with reason 'OK'.
Attempt 1 failed. BackendException: Bad status code 200 reason OK.

This goes vor 5 TImes:

Giving up after 5 attempts. BackendException: Bad status code 200 reason OK.
22:37:38.770 Task 'BKP' failed with exit code '50'.
--- Finished state FAILED 'code 50' at 22:37:38.770 - Runtime 00:03:35.535 ---

--- Start running command POST at 22:37:38.787 ---
Skipping n/a script '/root/.duply/www/post'.
--- Finished state OK at 22:37:38.797 - Runtime 00:00:00.010 ---