Firstly, I am using the homepage as my register page. The homepage have the proper shortcode:
[ms-membership-signup membership_signup_text="Sign Up"]
However, in the registration form, after fill all the required fields, the user is redirected to the homepage and the registration is not complete.
Changing the register page to the default one (/ register), that have the same shortcode as the homepage, the registration process works better, but returns and error:
"Please ensure that the Date of Birth information is completed."
I created a profile field on Buddypress called "Date of Birth" that uses a "Date selector" field.
In Membership 2 -> Settings -> Profile Fields, when I set this field to be "required" on the "Registration Form" it returns that error, only works if I set it to "optional".