Not in my personal experience, except actually benzos can help with the anxiety caused by weed.
I suppose the combo could make one more tired so don't drive or operate heavy machinery, but that's about it.
I've never made worse decisions because of a benzo/weed combo, but alcohol and benzos are something people should avoid.
Of course, those have a direct drug interaction.
But weed and benzos don't that I know of personally and I've never heard of studies proving that they potentiate eachother.