Javascript error on the login page causing a plugin conflict

Hi,

I work on the Wordfence plugin, and we’ve had some users report a conflict with Google Analytics Dashboard for WP, when using our 2FA feature on the wp-login page.

If “track form submit actions” is enabled on the “Events Tracking” tab of GADWP, this javascript error occurs when attempting to log in, because the analytics.js file is not loaded on the login page:
ReferenceError: ga is not defined

This error occurs even if Wordfence isn’t installed, but logins still work since the regular login button doesn’t rely on javascript, but we also add a handler to the login button, so the error above stops our script from running.

Could the click handler near the end of front/js/tracking-analytics-events.js bail out if ga is undefined? (I’m assuming the login form is intentionally not tracked, but I’m not sure.) If you have a proposed fix, I’d be happy to test to make sure it resolves the conflict with Wordfence.

Thanks!

-Matt R