Jenkins NUnit plugin 0.18 gives an error while reading nunit result xml file

When the Nunit plugin tries to read the test result xml file, it gives the below error.

Results (nunit3) saved as TestResult.xml
Recording NUnit tests results
ERROR: Step ‘Publish NUnit test result report’ aborted due to exception:
java.io.IOException: Could not transform the NUnit report. Please report this issue to the plugin author
at hudson.plugins.nunit.NUnitArchiver.invoke(NUnitArchiver.java:71)
at hudson.plugins.nunit.NUnitArchiver.invoke(NUnitArchiver.java:29)
at hudson.FilePath.act(FilePath.java:1018)
at hudson.FilePath.act(FilePath.java:996)
at hudson.plugins.nunit.NUnitPublisher.perform(NUnitPublisher.java:153)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:779)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:720)
at hudson.model.Build$BuildExecution.post2(Build.java:185)
at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:665)
at hudson.model.Run.execute(Run.java:1766)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:410)
Caused by: org.xml.sax.SAXParseException; systemId: file:/C:/Users/2554/.jenkins/workspace/TestProject/temporary-junit-reports/temp-junit.xml; lineNumber: 2; columnNumber: 3; Content is not allowed in prolog.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
at hudson.plugins.nunit.NUnitReportTransformer.splitJUnitFile(NUnitReportTransformer.java:102)
at hudson.plugins.nunit.NUnitReportTransformer.transform(NUnitReportTransformer.java:72)
at hudson.plugins.nunit.NUnitArchiver.invoke(NUnitArchiver.java:66)
... 13 more
Finished: FAILURE