Amazon Send to Kindle Network error occurred issue

Issue
Some may get this error " Network error occurred" when using Send to Kindle for Windows

Solution
Download and install this version.
http://s3.amazonaws.com/sendtokindle/SendToKindleForPC-installer-v1.0.1.237.exe

Install bacula client 5.2.x by yum

This will install Bacula client 5.2.12 from dassit repo

cd /etc/yum.repos.d/
wget http://download.opensuse.org/repositories/home:/dassit:/bacula/CentOS_CentOS-6/home:dassit:bacula.repo
yum install bacula-client

Adapted from http://www.dass-it.de/download/bacula, but run yum install bacula does not install the bacula client.

ERROR in authenticate.c:303 UA Hello from client:x.x.x.x:9101 is invalid. Len=-4

In Bacula bconsole, if you ever encounter an annoying message which repeats itself endlessly, here's the solution.

Issue
bacula-dir: ERROR in authenticate.c:303 UA Hello from client:10.1.0.151:9101 is invalid. Len=-4

Cause
Unknown. I got this error when I tried to run a backup from a remote client via haproxy. I used haproxy to publish port range 9101-9103.

Have tried 

• Restart bacula services (dir, sd, fd)
• Restart bacula server 

but none of them helped.

Solution
In Bacula working folder (/var/lib/bacula, or /opt/bacula/working, or your custom build folder), delete or move these files to another folder:

• bacula-dir, bacula-dir.9101.state, bacula-dir.conmsg

then restart bacula service

bacula restart