New Post: SharePoint 2010 creating Access Services 2013 error

When deploying SP13 (enterprise) with AutoSPInstaller and I select all Enterprise Services (excel, access) I get the following error time after time.
This happens with spsetup account being sql sysadmin, filled in the FQDN of the sql server instead of using the sql alias.

New-SPAccessServicesApplication : A connection could be established to the Application Database Server but mixed mode a
uthentication isn't enabled.
At line:1 char:1

• New-SPAccessServicesApplication -DatabaseServer sharepoint -Default -Name "Acces ...
  
  • ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  • CategoryInfo : ObjectNotFound: (Access Services:String) [New-SPAccessServicesApplication], InvalidOpera
    tionException
    
    • FullyQualifiedErrorId : Microsoft.Office.Access.Services.PowerShell.NewSPAccessServicesApplication
      

WARNING: An error occurred provisioning Access Services! Check the log for any details, then try again.