On your recommandation, I have successfully access another url of the staging branch by adding /about-us at the end.
From there, I’m able to access the homepage when I click on the navbar logo.
Which makes me think that that the homepage isn’t set as a private page, additional after checking the page parameters, the page is indeed set to public mode.
For the authentification plugin, I use the Weweb native one for testing purposes, and only one page is set with. Nevertheless it is not the homepage.
I’m still trying to figure out other troubles that makes this redirect error happens.
We looked at your project briefly again and I think the issue is the redirection set on your homepage, you have an empty redirection (app settings → redirections)