I hit the same problem. Took ages debugging the install scripts to get to the bottom of it.
There's an issue with one of the installation scripts which expects the user to have a role of 'Company Administrator' instead of 'Global Administrator'.
Try editing line 339 in C:\CloudDeployment\Setup\Common\AzureADConfiguration.psm1 and change the description to 'Global Administrator', and then re-run.
You might have to remove the module in PowerShell (Remove-Module) as well before re-running so that it gets imported again.