Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xporterCloudMigrationAccessor' defined in URL [bundle://260.0:0/META-INF/spring/atlassian-plugins-components.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.atlassian.migration.app.tracker.CloudMigrationAccessor': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.atlassian.migration.app.tracker.CloudMigrationAccessor]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/atlassian/migration/app/BaseAppCloudMigrationListener
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:600)
...
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.atlassian.migration.app.tracker.CloudMigrationAccessor': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.atlassian.migration.app.tracker.CloudMigrationAccessor]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/atlassian/migration/app/BaseAppCloudMigrationListener
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:304)
...
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.atlassian.migration.app.tracker.CloudMigrationAccessor]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/atlassian/migration/app/BaseAppCloudMigrationListener
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:187)
...
Caused by: java.lang.NoClassDefFoundError: com/atlassian/migration/app/BaseAppCloudMigrationListener
at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:941)
...
Caused by: java.lang.ClassNotFoundException: com.atlassian.migration.app.BaseAppCloudMigrationListener not found by com.atlassian.jira.migration.jira-migration-plugin [93]
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1639)
...

1. Please update the app, select All apps and search for Jira Cloud Migration Assistant,
2. Click on update request and wait for the request to be accepted,
3. While the request is not accepted, you can disable the Jira Cloud Migration Assistant app and activate Xporter