uni.request请求图片在手机端直接失败

创建一个新项目，直接请求图片地址，代码如下图

let avatar="https://jialongyaoye.oss-cn-beijing.aliyuncs.com/uploads/images/20211117222614c6fae7940.jpg";  
            console.log(123123213,avatar);   
                let index= avatar.lastIndexOf(".");   
                //获取后缀  
                let ext = avatar.substr(index+1);  
                uni.request({  
                            url: avatar,  
                            method: 'GET',  
                            responseType: 'arraybuffer',  
                            success: async res => {  
                                console.log(222,ext);  
                                let arrayBuffer = new Uint8Array(res.data)  
                                let base64 = "data:image/"+ext+";base64,"+uni.arrayBufferToBase64(arrayBuffer);  
                                console.log(555,base64);  
                            },  
                            fail:function(re){  
                                console.log(re);  
                            }  
                        }); 

运行后在PC端都正常

在手机端或者手机模拟器上都无法获取图片