Swap API is throwing error for slippage less than 8

Swap API is giving error with slippage < 8 and for other platform it is working fine with slippage 4-5. using 1inch API it is only working if slippage is 8 or greater than 8.

Below is request and response
Request:

https://api.1inch.exchange/v4.0/56/swap?fromTokenAddress=0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee&toTokenAddress=0x43a0c5eb1763a211aa3c05849a617f2ee0452767&amount=1000000000000000&slippage=6&fromAddress=WALLET_ADDRESS&gasPrice=5000000000

Response:

{"statusCode":400,"error":"Bad Request","description":"cannot estimate","meta":[],"requestId":"29ff5a1e-fdef-4949-9b3c-a88c16be35c9"}