Cannot find elements when XPath expression is null

[kazurayam]

I could get the stacktrace of the IllegalArgumentException, which is the root cause of the problem.

See

How to write Katalon Studio tests with IntelliJ IDEA and other IDEs

I tried patching the Katalon Studio engine by writing Groovy classes in the Include/scripts/groovy folder as devalex88 suggested. I worked on my GitHub project Cannot_find_elements_when_XPath_expression_is_null. You can checkout the tag 0.4 to my last code. patching the class com.kms.katalon.core.util.internal.ExceptionsUtil devalex88 suggested this patch. The patch resulted the following stacktrace: log_withPatchToExceptionsUtil.txt com.kms.katalon.core.exception.StepFailedException: Unabl…