By.xpath下拉框一直定位不到

web端代码如下：

1、直接通过xpath定位，失败

WebElement text =driver.findElement(By.xpath("/html/body/div[4]/div[1]/div[1]"));

报错：org.openqa.selenium.NoSuchElementException: no such element: Unable to locate element: {"method":"xpath","selector":"/html/body/div[4]/div[1]/div[1]"}

2、通过class定位，失败：

WebElement text =driver.findElement(By.xpath("//*[@class=\"el-select-dropdown__wrap el-scrollbar__wrap\"][2]"));

报错：org.openqa.selenium.NoSuchElementException: no such element: Unable to locate element: {"method":"xpath","selector":"//*[@class="el-select-dropdown__wrap el-scrollbar__wrap"][2]"}

求大神帮忙，指点