请帮我解决问题：＆＃34;等待＆＃34;不起作用20秒或30 ......，测试成功运行，但运行失败＆＃34;调试测试＆＃34;。 代码复制如下：
def PreSerializer(request, *args):
person = args[0]
if person == "david":
...
==========================
[FindsBy(How = How.XPath, Using = "/html/body/form/div[12]/div[1]/div[1]..../ul/li/a")]
private OpenQA.Selenium.IWebElement NewMRLink;
//..........
Pages.WaitForElementVisible(Browser.driver, CreateR);
CreateR.Click();
===================