Airflow OAuth - "Access is denied"

[Lewis John McGibbney]

Hi users@,
We have been working in migrating from LDAP authentication to OAuth Single Sign 
On. When a user logs in, they see a red prompt banner with the text "Access is 
denied". The user can simply click off of this banner and everything seems to 
work fine but this just looks weird. Has anyone else experienced this?
Thanks
lewismc