Excel Handler Error

Hi Team,

I am getting the below error when i tried to write the data into the excel

Reason:
java.lang.Error: Unresolved compilation problems:
Groovy:unable to resolve class MobileBuiltInKeywords
Groovy:unable to resolve class WSBuiltInKeywords
Groovy:unable to resolve class WebUiBuiltInKeywords

at libraryFunctions.ExcelRead.<init>(ExcelRead.groovy:22)
at com.kms.katalon.core.main.CustomKeywordDelegatingMetaClass.invokeStaticMethod(CustomKeywordDelegatingMetaClass.java:46)
at Delete_DevTestCompany.run(Delete_DevTestCompany:84)
at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)
at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)
at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:398)
at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:389)
at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:368)
at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:360)
at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:255)
at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:114)
at com.kms.katalon.core.main.TestCaseMain$runTestCase$0.call(Unknown Source)
at TempTestCase1631108976735.run(TempTestCase1631108976735.groovy:25)

2021-09-08 19:20:50.677 ERROR k.k.c.m.CustomKeywordDelegatingMetaClass - :x: Unresolved compilation problems:
Groovy:unable to resolve class MobileBuiltInKeywords
Groovy:unable to resolve class WSBuiltInKeywords
Groovy:unable to resolve class WebUiBuiltInKeywords

2021-09-08 19:20:50.679 ERROR c.k.k.core.context.internal.TestHooker - :x: com.kms.katalon.core.exception.StepErrorException: java.lang.Error: Unresolved compilation problems:
Groovy:unable to resolve class MobileBuiltInKeywords
Groovy:unable to resolve class WSBuiltInKeywords
Groovy:unable to resolve class WebUiBuiltInKeywords

at com.kms.katalon.core.main.CustomKeywordDelegatingMetaClass.throwError(CustomKeywordDelegatingMetaClass.java:96)
at com.kms.katalon.core.main.CustomKeywordDelegatingMetaClass.invokeStaticMethod(CustomKeywordDelegatingMetaClass.java:68)
at CompiledExcelReportHandler.generateCompiledExcelReport(ExcelReportHandler.groovy:40)
at CompiledExcelReportHandler.invokeMethod(ExcelReportHandler.groovy)
at com.kms.katalon.core.context.internal.TestHooker.invokeMethod(TestHooker.java:111)
at com.kms.katalon.core.context.internal.TestHooker.lambda$3(TestHooker.java:95)
at com.kms.katalon.core.context.internal.TestHooker.invokeContextMethods(TestHooker.java:94)
at com.kms.katalon.core.context.internal.TestListenerCollector.lambda$3(TestListenerCollector.java:88)
at com.kms.katalon.core.context.internal.TestListenerCollector.handleListenerEvent(TestListenerCollector.java:85)
at com.kms.katalon.core.context.internal.ExecutionEventManager.publicEvent(ExecutionEventManager.java:36)
at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:278)
at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:114)
at com.kms.katalon.core.main.TestCaseMain$runTestCase$0.call(Unknown Source)
at TempTestCase1631108976735.run(TempTestCase1631108976735.groovy:25)

Caused by: java.lang.Error: Unresolved compilation problems:
Groovy:unable to resolve class MobileBuiltInKeywords
Groovy:unable to resolve class WSBuiltInKeywords
Groovy:unable to resolve class WebUiBuiltInKeywords

at libraryFunctions.excelHandler.<init>(excelHandler.groovy:21)
at com.kms.katalon.core.main.CustomKeywordDelegatingMetaClass.invokeStaticMethod(CustomKeywordDelegatingMetaClass.java:46)
... 12 more