UPM online update fail with error: "An error was encountered while updating the UPM. Please see the logs for more details."
Exception in thread "Spring executor 24" org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'updateParametersFactory' defined in URL [bundle://156.0:0/META-INF/spring/atlassian-plugins-components.xml]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.atlassian.sal.api.pluginsettings.PluginSettingsFactory]: : Error loading class [com.atlassian.upm.selfupdate.async.SimpleAsyncTaskManager] for bean with name 'simpleAsyncTaskManager' defined in URL [bundle://156.0:0/META-INF/spring/atlassian-plugins-components.xml]: problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: com.atlassian.upm.selfupdate.async.SimpleAsyncTaskManager not found from bundle [Atlassian Universal Plugin Manager Self-Update Plugin (com.atlassian.upm.atlassian-universal-plugin-manager-selfupdate-plugin)]; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class [com.atlassian.upm.selfupdate.async.SimpleAsyncTaskManager] for bean with name 'simpleAsyncTaskManager' defined in URL [bundle://156.0:0/META-INF/spring/atlassian-plugins-components.xml]: problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: com.atlassian.upm.selfupdate.async.SimpleAsyncTaskManager not found from bundle [Atlassian Universal Plugin Manager Self-Update Plugin (com.atlassian.upm.atlassian-universal-plugin-manager-selfupdate-plugin)]