STM32H7 USB-DFU Not Working

[EPala.2]

Hi, I am working on a project where we need USB DFU on the STM32H730. I have selected the USB DFU function in the .IOC, compiled and uploaded to the hardware, but when I try uploading a new program both via this online DFU Tester (https://devanlai.github.io/webdfu/dfu-util/) and via CubeProgrammer in USB DFU mode. Neither works. I have attached some screenshots of my .IOC settings and of the errors I am getting.

How do I fix this?

 

 

[MM..1]

DFU in ioc is i mean for implement your own protocols and code. Set it in ioc do only prepare phase, no ready design.

For load firmware use sytem code STM32 microcontroller system memory boot mode - Application note