Cannot open DFU Device error

I got this error message when trying to upload my config file to my lightsaber, any advice?

c:/users/aidan/appdata/local/arduino15/packages/proffieboard/tools/arm-none-eabi-gcc/9-2020-q2-update/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/bin/ld.exe:C:\Users\Aidan\AppData\Local\Arduino15\packages\proffieboard\hardware\stm32l4\3.6\variants\STM32L433CC-ProffieboardV2/linker_scripts/STM32L433CC_FLASH.ld:224: warning: memory region `SRAM2' not declared
Sketch uses 237064 bytes (90%) of program storage space. Maximum is 262144 bytes.
Cannot open DFU device 0483:df11
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Cannot open DFU device 0483:df11

Run proffie-dfu-setup.exe

Instructions and download links can be found here:

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