Error when creating form for Donation Block

Site URL: https://apricots-ranunculus-jldd.squarespace.com/joinsu

Hello - 

I am working a new, unpublished site and am trying to create a donation block with a form.

I've created everything, - but when I click on the "Donate" button to presumably take me to the form, I get this error message. 

This site is currently private. If you’re the owner or contributor, log in.

When I click on "log in" I get 404 page not found. 

Any help would be apprecitated.

Thanks!

Thanks. That worked perfectly.

I apprecaite the help.