OpsHub Visual Studio Online Migration Utility - Cannot add Account Owner to Project Collection Service Account Group

I'm attempting to use the tool for a TFS 2012 Migration to VS Team Services. Validation is showing that I need permissions for my logged in User to be under the Project Collection Service Account Group. When I try to manually add my User as a "Member Of" through the website, I get a "You do not have permissions to perform this action"

My user is the Account Owner and a member of Team Foundation Service Administrator and Project Collection Service Administrator groups. Is there something I'm missing?

TFS has recently changed this to disallow users directly changing members of Service Account. There is however, a workaround that you can use.

1. Create a new (custom) VSO Group
2. Under 'Members', add your user.
3. Under 'Member of', add [DefaultCollection]Project Collection Service Accounts
4. Go back to OVSMU and re-validate the migration that you were creating.