Need to use taxonomy term as url argument to filter a view but the term is attached to a node ref field
Configure the Taxonomy: Term argument to use one of the relationships that you have set up. I do not know why you have an additional Node: Nid argument. According to your description, it is not necessary. Remove it unless you have some other requirement that makes this argument necessary.

Setting up the view in a way that does not match the requirements should not result in a blank page. The usual techniques for debugging PHP applications can be applied to figure out what went wrong: Printing out variable values or (if you have Xdebug or the like installed) step-by-step execution.