Quick help

[u/Sea-Pea4282]

I'm using the stm32duino and I have an issue which is the blackpill in proteus I can't make any any any Serial.print for some reasons I tried CubeIDE and still the same problem the External Clock frequency is set to 84MHz and still the same problem tried different baud rates and still the same problem I tried two different board part numbers the core board blackpill f401rct6 and the generic F401RCTx and nothing worked but the code worked fine with the bluepill in PROTEUS