CoursePress enrollment popup problems

When I use CoursePress together with the CoursePress theme, the enrollment button opens a popup when you go to course page as a visitor. Then when you try to create a new account there is two problems on mobile:

1. Its not scroll so I can't see the all form fields.
2. When I click one of the inputs blinking cursor shows different place, keyboard fills different place, just looks broken.

How can I fix them?