How does Browscap work?
I vaguely recall having that same error message, and running update.php solved it. So make sure you've installed the latest version and run update.php.

To get Browscap to log non-crawler user agents, head to /admin/reports/browscap/browsers and follow the instructions. They tell you to enable 'Monitor browsers' on the Browscap configuration screen.

To participate in the issue queue of Browscap, or any Drupal project, go to the project page and look on the right side. You'll see a list of maintainers, and under that a section called Issues for Browscap. Search for your issue there. Or just go to the project's issue list.