Unable to remove customware application links

2016-04-22 17:03:57.233141500 2016-04-22 17:03:57,229 http-nio-2992-exec-4 ERROR sysadmin 1023x9914x1 1sietsq 104.192.142.137 /rest/applinks/3.0/manifest/c27cc1f2-cbf0-3e14-9a33-6bf137f489ac.json [c.a.p.r.c.error.jersey.ThrowableExceptionMapper] Uncaught exception thrown by REST service: net.customware.plugins.connector.core.applinks.AppLinksManifestProducer$1.getIconUri()Ljava/net/URI;
2016-04-22 17:03:57.233143500 java.lang.AbstractMethodError: net.customware.plugins.connector.core.applinks.AppLinksManifestProducer$1.getIconUri()Ljava/net/URI;
2016-04-22 17:03:57.233181500 	at com.atlassian.applinks.core.rest.model.ManifestEntity.<init>(ManifestEntity.java:88)
2016-04-22 17:03:57.233182500 	at com.atlassian.applinks.core.rest.ManifestResource.response(ManifestResource.java:115)
2016-04-22 17:03:57.233182500 	at com.atlassian.applinks.core.rest.ManifestResource.getManifestFor(ManifestResource.java:110)
2016-04-22 17:03:57.233183500 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2016-04-22 17:03:57.233193500 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2016-04-22 17:03:57.233193500 	... 1 filtered
2016-04-22 17:03:57.233193500 	at java.lang.reflect.Method.invoke(Method.java:497)
2016-04-22 17:03:57.233194500 	... 3 filtered
2016-04-22 17:03:57.233194500 	at com.atlassian.applinks.internal.rest.interceptor.NoCacheHeaderInterceptor.intercept(NoCacheHeaderInterceptor.java:15)
2016-04-22 17:03:57.233200500 	... 1 filtered
2016-04-22 17:03:57.233200500 	at com.atlassian.applinks.core.rest.context.ContextInterceptor.intercept(ContextInterceptor.java:19)
2016-04-22 17:03:57.233201500 	... 15 filtered
2016-04-22 17:03:57.233201500 	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:154)
2016-04-22 17:03:57.233205500 	... 1 filtered
2016-04-22 17:03:57.233205500 	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:68)
2016-04-22 17:03:57.233206500 	... 40 filtered
2016-04-22 17:03:57.233206500 	at com.atlassian.applinks.cors.rest.CorsFilter.doFilter(CorsFilter.java:112)
2016-04-22 17:03:57.233207500 	... 8 filtered
2016-04-22 17:03:57.233211500 	at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
2016-04-22 17:03:57.233211500 	... 20 filtered
2016-04-22 17:03:57.233211500 	at com.atlassian.jira.plugins.rest.HOT25715FixServletFilter.doFilter(HOT25715FixServletFilter.java:46)
2016-04-22 17:03:57.233212500 	... 25 filtered
2016-04-22 17:03:57.233212500 	at com.atlassian.plugin.connect.plugin.auth.scope.ApiScopingFilter.doFilter(ApiScopingFilter.java:81)
2016-04-22 17:03:57.233216500 	... 14 filtered
2016-04-22 17:03:57.233216500 	at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:76)
2016-04-22 17:03:57.233221500 	at com.atlassian.jira.security.JiraSecurityFilter$$Lambda$453/22857497.doFilter(Unknown Source)
2016-04-22 17:03:57.233222500 	... 1 filtered
2016-04-22 17:03:57.233222500 	at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:74)
2016-04-22 17:03:57.233222500 	... 16 filtered
2016-04-22 17:03:57.233223500 	at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:37)
2016-04-22 17:03:57.233227500 	... 16 filtered
2016-04-22 17:03:57.233227500 	at com.atlassian.studio.jira.homepage.CloudHomepageFilter$Action.lambda$nextInFilterChain$1(CloudHomepageFilter.java:110)
2016-04-22 17:03:57.233228500 	at com.atlassian.studio.jira.homepage.CloudHomepageFilter$Action$$Lambda$450/15394385.execute(Unknown Source)
2016-04-22 17:03:57.233228500 	at com.atlassian.studio.jira.homepage.CloudHomepageFilter.doFilter(CloudHomepageFilter.java:68)
2016-04-22 17:03:57.233233500 	... 17 filtered
2016-04-22 17:03:57.233233500 	at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
2016-04-22 17:03:57.233233500 	... 5 filtered
2016-04-22 17:03:57.233233500 	at com.atlassian.plugin.connect.plugin.auth.user.ThreeLeggedAuthFilter.doFilter(ThreeLeggedAuthFilter.java:109)
2016-04-22 17:03:57.233234500 	... 3 filtered
2016-04-22 17:03:57.233238500 	at com.atlassian.jwt.internal.servlet.JwtAuthFilter.doFilter(JwtAuthFilter.java:32)
2016-04-22 17:03:57.233244500 	... 8 filtered
2016-04-22 17:03:57.233244500 	at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
2016-04-22 17:03:57.233245500 	... 4 filtered
2016-04-22 17:03:57.233245500 	at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)
2016-04-22 17:03:57.233245500 	... 29 filtered
2016-04-22 17:03:57.233245500 	at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
2016-04-22 17:03:57.233252500 	... 28 filtered
2016-04-22 17:03:57.233252500 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
2016-04-22 17:03:57.233252500 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
2016-04-22 17:03:57.233253500 	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
2016-04-22 17:03:57.233253500 	at java.lang.Thread.run(Thread.java:745)