stm32g0b1 usb endpoint3 problem

[zhuliangliang]

Hello,

I'm using STM32G0B1RCT6 

use cubemx generate cdc project works ok

but when I edit  endpoint to 0x03 it Not working properly

USB packet capture  endpoint 0x03   returns stall

ny Idea about this issue and how to fix it please?

Thanks.