Trick to importing Mouser xlxs BOMs?

[Micpoc]

I've been trying for a couple of days to import the Excel BOM for Aion's Blueshift into Mouser's BOM tool with no luck; I am always getting "Sorry, we could not process your request at this time. Please try again in a few minutes." Is this a typical problem, or is there some trick to it I am unaware of?