Hi Rick,
Sorry for the late reply.
It looks like the RSS feed you are using is not valid and has syntax errors.
Can you please fix the RSS feed ?
I tried validating the RSS feed online and I see issues with it.
You will see the same error even when you use the default RSS feed widget.
Issue will be gone once you fix the RSS feed.
I guess it is because of the blank lines on the beginning.
Thanks,
Aakash