How to resolve class loader issue? I am getting GroovyCastException : Cannot cast object.

This is a groovy script. I am trying to set property and execute the test case.

Code:

//FilePath to .csv file provided in the Test Suite Property

def inputPath = testRunner.testCase.testSuite.getPropertyValue("FilePath")

File file = new File (inputPath.toString()).eachLine{

testRunner.testCase.testSuite.setPropertyValue("inGUID",it.split(",")[0])

def tc = testRunner.testCase.testSuite.testCases["TestCase 1"]

def runner = tc.run(null,false)

}

Note: This code worked fine before my computer abruptly restarted. So all the changes were lost and I had to rewrite the same code again, since then I am getting this error.

Code is typed manually in the response, kindly ignore the typos. I hope the snippet will give an overview.