Troubles with EmailThisIssueMailHandler

[Marc Rexer]

Dear Communitiy,

I have an issue with JETI showing the following log entry - unfortunatelly I don´t know how to fix it, can you please help me?

2019-06-17 12:41:31,455 ERROR [jira@xxx.de] Caesium-1-2 anonymous    jira Handler 'com.metainf.jira.plugin.emailissue.handler.EmailThisIssueMailHandler' cannot be instantiated because there is no corresponding enabled module defining message-handler of such class
2019-06-17 12:41:31,455 ERROR [jira@xxx.de] Caesium-1-2 anonymous    jira jira[10200]: Cannot instantiate message handler 'com.metainf.jira.plugin.emailissue.handler.EmailThisIssueMailHandler. This service will not work until this problem is fixed.
2019-06-17 12:41:31,455 ERROR [jira@xxx.de] Caesium-1-2 anonymous    jira jira[10200]: Exception: null
java.lang.NullPointerException
	at com.atlassian.jira.service.services.mail.MailFetcherService.processMessage(MailFetcherService.java:415) [jira-api-7.11.2.jar:?]
	at com.atlassian.jira.service.services.mail.MailFetcherService$MessageProviderImpl.getAndProcessMail(MailFetcherService.java:272) [jira-api-7.11.2.jar:?]
	at com.atlassian.jira.service.services.mail.MailFetcherService.processMessages(MailFetcherService.java:404) [jira-api-7.11.2.jar:?]
	at com.atlassian.jira.service.services.mail.MailFetcherService.runImpl(MailFetcherService.java:396) [jira-api-7.11.2.jar:?]
	at com.atlassian.jira.service.services.file.AbstractMessageHandlingService.run(AbstractMessageHandlingService.java:229) [jira-api-7.11.2.jar:?]
	at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:68) [classes/:?]
	at com.atlassian.jira.service.ServiceRunner.runService(ServiceRunner.java:62) [classes/:?]
	at com.atlassian.jira.service.ServiceRunner.runServiceId(ServiceRunner.java:44) [classes/:?]
	at com.atlassian.jira.service.ServiceRunner.runJob(ServiceRunner.java:32) [classes/:?]
	at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:153) [atlassian-scheduler-core-1.7.0.jar:?]
	at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:118) [atlassian-scheduler-core-1.7.0.jar:?]
	at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:97) [atlassian-scheduler-core-1.7.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:443) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:438) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJobWithRecoveryGuard(CaesiumSchedulerService.java:462) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:390) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:285) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:282) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:65) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:59) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34) [atlassian-scheduler-caesium-1.3.3.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_102]