Can anyone help me with the following TA-mailclient "ExecProcessor" ERROR ?

[vdtolbert]

I am getting an error message when the TA-mailclient runs, The message is:

10/1/18
11:28:21.682 AM 
10-01-2018 11:28:21.682 -0500 ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/TA-mailclient/bin/mail.py" ERROR'NoneType' object has no attribute 'nodeValue'

host =  xxxxxxxxxxxx    
source =    /opt/splunk/var/log/splunk/splunkd.log  
sourcetype =    splunkd 

This error message comes after the messages:

IMAP - Connecting to mailbox as xxxxxx@xxxxx.com
Listing folders in mailbox=xxxxxxx@xxxxx.com
Accessing mailbox with readonly attribute

Has anyone seen this issue before?

[vdtolbert]

It is written in Python of which I have no experience. Any help is appreciated.