Flexible Format Feed spitting out Internal Error with my XLS

Hello, I’m trying to get a flexible feed going so I can create a feed that better matches variables another technology is looking for, so I figured the Flexible Feed was my best option. I’m new to XLS so I tried something very basic that I’m fairly sure is valid, but when I try to set it up it tells me that there is an internal server error and it fails. I’ve attached the XLS, can anyone let me know if it should be accepting this or is it truly an internal server problem, and if so, how do I go about reporting it to Kaltura?

I attached an image because of formatting issues trying to paste xsl: