[SOLVED] CB Login module (CB 2.0) causes error on page load

I've upgraded to CB 2.0 Stable on one of my test sites. When I have the CB Login module enabled, the following message appears instead of a normal page:

1064 - You may not be able to visit this page because of:

An out-of-date bookmark/favourite
A search engine that has an out-of-date listing for this site
A mis-typed address
You have no access to this page
The requested resource was not found
An error has occurred while processing your request.
Please try one of the following pages: Home Page
If difficulties persist, please contact the system administrator of this site.

In addition, the template does not load fully - DIVs do not close, etc.

I tried the CB Nightly Build dated Oct. 16th, 2014 and the issue persists. I'm using Bootstruct as my template, and a DEV version of Kunena 3.1 as well (As mentioned, this is my test site).

Any idea what could be causing this? I can give a login to anyone who would like to poke around at it.

Enable debug mode and maximum error reporting then see if any error exposes. Why do you say CB Login causes that? Does disabling CB Login module resolve your issue? Do you have plugins integrations enabled in your CB Login module? If so disable it and see if that resolves it as it could be an incompatible plugin loading that's causing your issue.

Correct, disabling the module resolves the issue. I have no integrations specific to the CB Login module, no - I do have Kunena integrations enabled, I will try that.

Good call - it was the "Private Messaging System (uddeIM PMS)" plugin that was causing the issue.