The error when you click the admin page link is because I forgot to remove something from the create data script when I removed the Users.ascx module. To fix that you need to
DELETE FROM mp_ModuleDefinitions WHERE ModuleDefID = 15
and also
DELETE FROM mp_Modules WHERE ModuleDefID = 15
The users are now managed from the Member List Page by login as admin, Users.ascx no longer exists in the project.
I will fix the create data script for the next release.
I'll look into the blank page issue next.