Flow Designer Error before flow starts

Hi all!

I am getting this Flow Designer error at submission before it even hits any of the stages in the flow. I have a new Service Catalog Flow I am testing. The Flow is selected on the Maintain Items table. Anyone know what causes this & how to fix?

Flow Designer: Operation(ANDE Default.cffe19e61be3a15076324332dd4bcb0d.13fe19e61be3a15076324332dd4bcb35.InlineScript_requested_forf80f99e69de3a1504a4a36f2349c338f) failed with error: com.snc.process_flow.exception.OpException: Error: Cannot read property "variables" from null,Detail: Cannot read property "variables" from null