When accessing the Web Interface, you're met with an error page listing the following error:
Cannot read configuration file due to insufficient permissions
This page will also list the path to the web.config file that it's trying to access.
Configure READ access to the Public folder for the local group IIS_IUSRS.
D:\Program Files\One Identity\Active Roles\7.X\Web\Public
Configure the application pool ARWebAppPool to use a custom account that does have read access to the folder above.
Please refer to Microsoft IIS Help documentation for more information on configuring IIS Application Pool identity.