what's this weird : JSON Parse error: Unexpected identifier "Tunnel"

i was trying to fetch some data from the server to display in the react native app. it was worked before but i don't know what happened after, i added a console.log in the catch of fetch.. it showing me error like

JSON Parse error: Unexpected identifier "Tunnel" - node_modules/promise/setimmediate/core.js:37:14 in tryCallOne - node_modules/promise/setimmediate/core.js:123:25 in - ... 8 more stack frames from framework internals

fetch(`${this.props.baseUrl}/products?page=${this.state.page}&per_page=10`,{    method:"get",    headers:{        AUTH_TOKEN: this.props.AUTH_TOKEN    }}).then(res=>res.json()).then(data=>{    if(data.success==true){        this.page++;        this.props.toggleLoading();        this.props.loadProducts(data.products);    }}).catch(err=>console.log(err)); //error here ..i dont know why that's throwing this kinda error