The error you've reported typically comes to calling Sys.OleObject('<classID>') where the <classID> specified, for some reason, does not exist in the registry of the machine on which you are running the test as per AlexKaras. In looking at your code, the only place I see a call like that is in Event_Script.svb where you are making calls to
Sys.OleObject('Excel.Application')
So, my suspicion is that, on the machine that you are using to run your tests, Excel is not installed or, if it is, it has not been properly installed where the registry is updated.