Selenium:：Remote:：Driver:单击锚元素不起作用

我有下面的html代码，其中包含一个锚元素，我想单击它，以便调用该元素中指定的脚本

<div class="ToolsContainer">
<a target="_blank" href="checkup.aspx">
<img class="Tools-img" src="/images/tools02.jpg">
<p class="Tools-text center gray"><span class="black_bold Tool">Checkup</span>
<br>Tool area.</p></a>
</div>

但我得到了以下错误：

Error while executing command: click: The requested resource could not be found, or a request was received using an HTTP method that is not supported by the mapped resource.: mouseClick
Build info: version: '3.5.3', revision: 'a88d25fe6b', time: '2017-08-29T12:54:15.039Z'
System info: host: 'myhost.de', ip: '178.xxx.yyy.zzz', os.name: 'Linux', os.arch: 'amd64', os.version: '3.16.0-042stab127.2', java.version: '1.8.0_172'
Driver info: driver.version: unknown at /usr/local/share/perl/5.20.2/Selenium/Remote/Driver.pm line 313.
 at /usr/local/share/perl/5.20.2/Selenium/Remote/Driver.pm line 313.
Since a few links/buttons where accessible for JavaScriptcode in this project, I tried this as well:
$selen->execute_script( 'var xpath = "//a[@href=\'checkup.aspx\']"; var xpathResult = document.evaluate(xpath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue; xpathResult.click()' );

这次错误消息如下所示：

Error while executing command: executeScript: TypeError: xpathResult is null
Build info: version: '3.5.3', revision: 'a88d25fe6b', time: '2017-08-29T12:54:15.039Z'
System info: host: 'myhost.de', ip: '178.xxx.yyy.zzz', os.name: 'Linux', os.arch: 'amd64', os.version: '3.16.0-042stab127.2', java.version: '1.8.0_172'
Driver info: driver.version: unknown at /usr/local/share/perl/5.20.2/Selenium/Remote/Driver.pm line 313.
 at /usr/local/share/perl/5.20.2/Selenium/Remote/Driver.pm line 313.

---

这里出了什么问题？对代码的哪些更改（我被绑定到S:R:D）可能会使事情正常进行？

尝试添加wait for，然后单击该按钮webelement@AnkurSingh：我将find_元素调用包装在来自Selenium:：water的wait_until中，但这没有帮助。

Error while executing command: executeScript: TypeError: xpathResult is null
Build info: version: '3.5.3', revision: 'a88d25fe6b', time: '2017-08-29T12:54:15.039Z'
System info: host: 'myhost.de', ip: '178.xxx.yyy.zzz', os.name: 'Linux', os.arch: 'amd64', os.version: '3.16.0-042stab127.2', java.version: '1.8.0_172'
Driver info: driver.version: unknown at /usr/local/share/perl/5.20.2/Selenium/Remote/Driver.pm line 313.
 at /usr/local/share/perl/5.20.2/Selenium/Remote/Driver.pm line 313.