Since the BCH address of the PIEXGO platform is the latest address, some exchanges do not support the deposit/withdrawal of this address. When you choose to deposit/withdrawal BCH, you will meet the error notes in deposit/withdrawal situation.
Therefore, you need to change your address. In addition，for safety's sake, you can consult other platforms whether they accept the address or not.
Change method: https://cashaddr.bitcoincash.org/