Registration page does not work

I'm setting up Membership for the first time and can't get the registration page working.

I have created a new page and added the [subscriptionform] to it. When I access the page without being logged in the page does not show anything after the "Hint: The password should be" paragraph. The sidebar and footer are also missing. When I visit the page as admin it redirects me to step 2 correctly.

I've added a screenshot of the registration page.

I'm using bbPress plugin. Could it cause this?