Setup Wizard fails at "Profile Settings" on Ubuntu 20.04 LTS

When I reach the Profile Settings page in the Openfire v4.6.2 Setup Wizard and click Continue I get:
“A failure occurred while fetching your session from the server. This is typically a cookie issue. Please either clear all cookies for this domain or try this URL again from an incognito browser session”.
I have tried clearing cookies and running in an incognito browser session with the same result. Are manual setup instructions available that don’t require the use of the Setup Wizard?