Cannot find elements when the selector is null.

[CPPAlien]

The problem

When I use findElement, I encountered the error below.

java.lang.IllegalArgumentException: Cannot find elements when the selector is null.
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:314)
    at io.appium.java_client.DefaultGenericMobileDriver.findElement(DefaultGenericMobileDriver.java:62)
    at io.appium.java_client.AppiumDriver.findElement(AppiumDriver.java:1)
    at io.appium.java_client.android.AndroidDriver.findElement(AndroidDriver.java:1)
    at org.openqa.selenium.remote.RemoteWebDriver.findElementById(RemoteWebDriver.java:363)
    at io.appium.java_client.DefaultGenericMobileDriver.findElementById(DefaultGenericMobileDriver.java:70)
    at io.appium.java_client.AppiumDriver.findElementById(AppiumDriver.java:1)
    at io.appium.java_client.android.AndroidDriver.findElementById(AndroidDriver.java:1)
    at com.qunhe.avocado.lib.Avocado.tap(Avocado.java:53)
    at com.qunhe.avocado.steps.MyStepdefs.tap(MyStepdefs.java:48)
    at ✽.tap "OK"(/Users/qunhe/IDEA/KoolTest/src/test/features/xigua.feature:3)

Environment

• Appium version (or git revision) that exhibits the issue: 1.8.2-beta
• Last Appium version that did not exhibit the issue (if applicable):
• Desktop OS/version used to run Appium:
• Node.js version (unless using Appium.app|exe):
• Mobile platform/version under test: android
• Real device or emulator/simulator:
• Appium CLI or Appium.app|exe:

Link to Appium logs

https://gist.github.com/CPPAlien/3f9bfb849fe8033293ec6dcbc11d4022

[mykola-mokhnach]

This looks like a problem with the client code. I don't observe any issues in the attached log

[imurchie]

There is also no indication of a find element call ever getting to the server.

[lock[bot]]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.