Error While creating input for add-on created using Splunk Add-on builder

[shugup2923]

Hello,

I have created one add-on to collect data using python code, testing gives me the required data, But once I try to create input in this add-on I am getting below error-

Unexpected error "<class 'splunktaucclib.rest_handler.error.RestError'>" from python handler: "REST Error [400]: Bad Request -- HTTP 400 Bad Request -- {"messages":[{"type":"ERROR","text":"'NoneType' object has no attribute 'startswith'"}]}". See splunkd.log/python.log for more details.

Can anyone help on this ???