Woo Commerce was blocking login. It allowed the “advertiser” role user to go to /wp-admin and to login, but then the profile.php page would not render – got the White screen.
De-Activated Woo Commerce.
Now a user “advertiser” is getting to their own profile page, and can navigate to the Ad Rotate Pro – Advertiser page.
I would very much like for advertisers not to see other things (Jetpack, Dashboard, Visual Composer) and only to see their profile and the advertiser page, and I am looking at “Plugin: Remove Dashboard Access” for this purpose.