JIRA Bamboo plugin throwing NullPointerException for Confluence

Server logs show that aplan key is invalid

@4000000049d45ae807f3e18c 2009-04-02 01:27:42,130 ERROR [TP-Processor123] [FiveOhOh] 500 Exception was thrown.
@4000000049d45ae807f3e95c java.lang.NullPointerException
@4000000049d45ae807f3ed44 at com.atlassian.bamboo.plugins.jiraPlugin.actions.ajax.ViewPlanStatusByJiraKey.findLatestReleventBuild(ViewPlanStatusByJiraKey.java:83)
@4000000049d45ae807f3f514 at com.atlassian.bamboo.plugins.jiraPlugin.actions.ajax.ViewPlanStatusByJiraKey.execute(ViewPlanStatusByJiraKey.java:66)
@4000000049d45ae807f3f8fc at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
@4000000049d45ae807f4953c at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
@4000000049d45ae807f49924 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
@4000000049d45ae807f49d0c at java.lang.reflect.Method.invoke(Method.java:597)
@4000000049d45ae807f4a0f4 at com.opensymphony.xwork.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:358)
@4000000049d45ae807f4b47c at com.opensymphony.xwork.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:218)
@4000000049d45ae807f4b864 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:192)
@4000000049d45ae807f4bc4c at com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:175)
@4000000049d45ae807f4db8c at com.atlassian.bamboo.ww2.interceptors.BambooWorkflowInterceptor.doIntercept(BambooWorkflowInterceptor.java:33)
@4000000049d45ae807f4df74 at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
@4000000049d45ae807f4e744 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
@4000000049d45ae807f4f2fc at com.opensymphony.xwork.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:115)
@4000000049d45ae807f4facc at com.atlassian.bamboo.ww2.interceptors.BambooValidationInterceptor.doIntercept(BambooValidationInterceptor.java:33)
@4000000049d45ae807f4feb4 at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
@4000000049d45ae807f50e54 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
@4000000049d45ae807f5123c at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
@4000000049d45ae807f51624 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
@4000000049d45ae807f51df4 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
@4000000049d45ae807f53564 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
@4000000049d45ae807f5394c at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
@4000000049d45ae807f5411c at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
@4000000049d45ae807f54504 at com.opensymphony.webwork.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:174)
@4000000049d45ae807f554a4 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
@4000000049d45ae807f5588c at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
@4000000049d45ae807f55c74 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)
@4000000049d45ae807f5605c at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)