I'm trying to activate multisite for subdomains but I get an Incorrect Password Error

I’m exploring the hosting service on a seven day trial. My goal is to start staging my main Website for conversion to multisite. I notices a multisite “switch” on the hub 2.0 panel under the “Tools” Tab.
When I attempted to use the feature The page returns a “Invalid Password Error”
I changed and confirmed the password several times and I am now at a loss.
Thank you in advance for any help.

All the best,

Peter