In case anyone having the same issue. I've found a fix from this Forum:

Basically you need to clear the code by using the WCH LinkUtility app and WCH LinkE. Make sure to set the WCH LinkE link mode to WCH-LinkRV then clear All Code Flash by Power Off. For those with the black Ch32V003 F4P7 board if your green LED is blinking it wont upload any code due to the led is connected to the upload pin