Install stopped at acpi_install_wakeup handler

[Lowell]

I am trying to install FreeNas on a virtual machine, i know this isnt a suggested thing to do but i wont actually be storing information its purely for a test as i will be getting a computer that i can dedicate to it soon and wanted to have a run through at setting up the software. when i am running the install it gets to the section where you can select your boot options e.g. safe mode, normal mode. i select enter to run in normal mode and then it stops and says "stopped at acpi_install_wakeup handler" after it has said this message it gives me the option to type something db>