Cannot Send PCX from Polkadot Web Wallet

[TMTMONEY]

I recieve a Verification Error: Execution failed: ApiError (Could not convert parameter 'tx' between node and runtime.
need help to transfer PCX assets from Polkadot ChainX web wallet into DAPPs.

[liuchengxu]

cc @qinghuan-chain

[aaurix]

@TMTMONEY Could you provide a detailed description ? I am not sure how this problem arises