USB as DFU on NUCLEO-L476RG gives "Device Descriptor Request Failed"

[Panometric]

I'd like to use the system DFU on the L476 but Windows says "Device Descriptor Request Failed"

• Connect ST-Link USB for power
• Jumper CN7 VDD to Boot0
• Connect PA11 to white D-
• Connect PA12 to Green D+
• Connect USB GND
• SB31 is in so Vusb has VDD already.
• Press Reset button

Note this Nucleo model lacks an HSE, so the 48 MHz has to come from MSI which is supposed to be automatically trimmed to LSE on this MCU. So my expectation is that this should work.

Am I missing something?

[Panometric]

NVM, The D-/D+ Needed swapped.