transfer asset from spot to iso margin get unknown error

recently im developing some apo an use binance api to tranfer from spot to isolated margin, it already work before, but recently i get
response ={‘code’: -1000, ‘msg’: ‘An unknown error occurred while processing the request.’}

what does it mean , and how i can fix it,
or what the requirement to make it working?

What happens if you use to do the transference? This because it might be possible that the final sent request url structure has bad format which can lead to this error.