Testng Error

I am getting following any help appreciated.

[TestNG] Running:
C:\Users\mahmed\AppData\Local\Temp\testng-eclipse--1108226868\testng-customsuite.xml

[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\Default suite\Default test.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\Default suite exists: true
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\Default suite\Default test.xml
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\Default suite exists: true
FAILED CONFIGURATION: @BeforeSuite checkSuiteSkip
java.lang.NullPointerException
at com.SatoriMainProject.util.Xlsx_Reader.getRowCount(Xlsx_Reader.java:67)
at com.SatoriMainProject.util.TestUtil.isSuiteRunnable(TestUtil.java:9)
at com.categoryReview.suite.TestSuiteBase.checkSuiteSkip(TestSuiteBase.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:86)
at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:515)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:216)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:143)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:305)
at org.testng.SuiteRunner.run(SuiteRunner.java:268)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1225)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1150)
at org.testng.TestNG.runSuites(TestNG.java:1075)
at org.testng.TestNG.run(TestNG.java:1047)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:126)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:137)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:58)

SKIPPED CONFIGURATION: @BeforeTest checkTestSkip
SKIPPED CONFIGURATION: @AfterTest reporttestResults
SKIPPED: ItemRankingFunctionalTest
java.lang.RuntimeException: java.lang.NullPointerException
at org.testng.internal.MethodInvocationHelper.invokeDataProvider(MethodInvocationHelper.java:163)
at org.testng.internal.Parameters.handleParameters(Parameters.java:430)
at org.testng.internal.Invoker.handleParameters(Invoker.java:1243)
at org.testng.internal.Invoker.createParameters(Invoker.java:992)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1082)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)
at org.testng.TestRunner.privateRun(TestRunner.java:778)
at org.testng.TestRunner.run(TestRunner.java:632)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:366)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:361)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:319)
at org.testng.SuiteRunner.run(SuiteRunner.java:268)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1225)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1150)
at org.testng.TestNG.runSuites(TestNG.java:1075)
at org.testng.TestNG.run(TestNG.java:1047)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:126)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:137)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:58)
Caused by: java.lang.NullPointerException
at com.SatoriMainProject.util.Xlsx_Reader.isSheetExist(Xlsx_Reader.java:451)
at com.SatoriMainProject.util.TestUtil.getData(TestUtil.java:53)
at com.categoryReview.suite.ItemRankingTest.getTestData(ItemRankingTest.java:317)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:86)
at org.testng.internal.MethodInvocationHelper.invokeDataProvider(MethodInvocationHelper.java:137)
... 21 more


===============================================
Default test
Tests run: 1, Failures: 0, Skips: 1
Configuration Failures: 1, Skips: 2
===============================================


===============================================
Default suite
Total tests run: 1, Failures: 0, Skips: 1
Configuration Failures: 1, Skips: 2
===============================================

[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\toc.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\Default test.properties
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\index.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\main.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\groups.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\classes.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\reporter-output.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\methods-not-run.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Problem creating output directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite\testng.xml.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\Default suite exists: true
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old\index.html
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\old exists: true
[TestNG] Time taken by org.testng.reporters.SuiteHTMLReporter@25a65b77: 64 ms
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\junitreports\TEST-com.categoryReview.suite.ItemRankingTest.xml
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\junitreports exists: true
[TestNG] Time taken by org.testng.reporters.JUnitReportReporter@3d299e3: 15 ms
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\testng-failed.xml
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output exists: true
[Utils] Attempting to create C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\Default suite\testng-failed.xml
[Utils] Directory C:\Users\mahmed\Desktop\SpinsWorkspace\SatoriMainProject\test-output\Default suite exists: true
[TestNG] Time taken by [FailedReporter passed=0 failed=0 skipped=0]: 0 ms
[TestNG] Time taken by org.testng.reporters.jq.Main@3c87521: 47 ms
[TestNG] Time taken by org.testng.reporters.XMLReporter@358c99f5: 16 ms
[TestNG] Time taken by org.testng.reporters.EmailableReporter2@6b419da: 15 ms