Hey, on binance futures testnet (testnet.binancefuture.com) API, we can’t change the margin mode (isolated or cross) because the endpoint is down. Here’s the error:
binanceusdm POST https://testnet.binancefuture.com/fapi/v1/marginType 500 Internal Server Error Request occur unknown error.
It happens since I try (one week), I think it’s just not maintained, so I can’t really use binance futures testnet normally, hope this will be fixed soon!