@littlepackage Thank you for the advice. The password is only for the password protection since it is in development. Its not the wordpress password. Otherwise you cant see the the page. I will provide more information.
thank you for your explanation. I solved that problem with the following steps:
1. Create ACF Field
2. Set [ratemypost] as default
3. Add value of ACF field as dynamic content to a text field in the template