程序在打开弹出窗口后卡住了

该工具单击一个按钮，然后出现一个模态窗口(我需要在其中填写一些信息，然后移至父窗口).但是，一旦出现新的模态窗口，我的代码就会停止.一旦我手动关闭新的弹出窗口，代码就会恢复.

The tool clicks a button and a modal window appears (where I need to fill in some information and later move to parent window). But as soon as the new modal window appears, my code stops. The code resumes once I manually close the new popup window.

由于代码本身停止运行，因此我无法在新的弹出窗口或父窗口中执行任何操作.

Since the code itself halts, I am not able to perform any actions in the new popup window, nor in the parent window.

System.out.println ("Up");
WebElement addButton = driver.findElement(By.id("btnAdd"));
addButton.click ();
System.out.println ("Down");

在上面的代码中，上会在控制台中打印，而下则不会打印，除非我手动关闭弹出窗口.

In the above code, Up gets printed in the console while Down doesn't get printed until I manually close the popup window.