USB device not recognized

[jarkubes]

Hello,
I'd like to ask you for help.
I am not STM32 expert.
I am testing your firmware FirmGRBL32-150120.
When I use your original .../Release/stm32grbl11.hex, BluePill works as intended.
When I do a fresh build and connect BluePill USB to PC, Windows 10 says: "USB device not recognized".
Where am I making mistake?
Thank you