I am unable to login to Streams on my mobile device

I am unable to login to Streams on my mobile device

I have downloaded the Streams iOS app, and attempt to login. This opens the OneAuth app, where I try to use my Google account to login, at which point I am prompted for a Google Authenticator code. I supply using the same choice as I used to login to mobile Zoho Mail, which prompt me again to "open this page in OneAuth", then opens a Safari window, and then spins forever with four bouncing colored squares with the message "Loading..."

How can I get into Streams on mobile?