[atlassian.migration.app.AbstractCloudMigrationRegistrar]  Failed to execute server listener for app-migration for transferId 85d4c771-aaa9-400d-8fb0-c5aa6fbf57a3, server app key com.thinktilt.proforma.add-on, cloud app key com.atlassian.proforma.proforma-migrator with exception:
java.lang.reflect.InvocationTargetException: null
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
        at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:?]
        at com.atlassian.migration.app.DiscoverableListenerProxy.onStartAppMigration(DiscoverableListenerProxy.kt:57) ~[plugin.13816920650708593080.jira-migration-plugin-1.12.45.jar:?]
        at com.atlassian.migration.app.DiscoverableListenerProxy.onRerunAppMigration(DiscoverableListenerProxy.kt:94) ~[plugin.13816920650708593080.jira-migration-plugin-1.12.45.jar:?]
        at com.atlassian.migration.app.AbstractCloudMigrationRegistrar.executeRerun(AbstractCloudMigrationRegistrar.kt:248) ~[plugin.13816920650708593080.jira-migration-plugin-1.12.45.jar:?]
        at com.atlassian.migration.app.AbstractCloudMigrationRegistrar.executeTransfer(AbstractCloudMigrationRegistrar.kt:165) ~[plugin.13816920650708593080.jira-migration-plugin-1.12.45.jar:?]
        at com.atlassian.jira.migration.app.CloudMigrationRegistrar.runJob(CloudMigrationRegistrar.kt:365) ~[plugin.13816920650708593080.jira-migration-plugin-1.12.45.jar:?]
        at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:134) ~[atlassian-scheduler-core-5.0.1.jar:?]
        at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:106) ~[atlassian-scheduler-core-5.0.1.jar:?]
        at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:90) ~[atlassian-scheduler-core-5.0.1.jar:?]
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:500) ~[atlassian-scheduler-caesium-3.1.4.jar:?]
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeLocalJobWithRetryOnFailure(CaesiumSchedulerService.java:463) ~[atlassian-scheduler-caesium-3.1.4.jar:?]
        at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:413) ~[atlassian-scheduler-caesium-3.1.4.jar:?]
        at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:66) [atlassian-scheduler-caesium-3.1.4.jar:?]
        at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:60) [atlassian-scheduler-caesium-3.1.4.jar:?]
        at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:35) [atlassian-scheduler-caesium-3.1.4.jar:?]
        at java.lang.Thread.run(Unknown Source) [?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because the return value of "java.lang.reflect.InvocationHandler.invoke(Object, java.lang.reflect.Method, Object[])" is null
        at jdk.proxy91.$Proxy6582.getServerPort(Unknown Source) ~[?:?]