After Update from 3.6.7 to 3.6.9 we can not start Rundeck-Jobs

Jenkins-Job-Output
Error while talking to Rundeck's API at xxxxxx : Error running the job : Unsupported Media Type

Jenkins-Log
WARNING o.j.p.s.d.DescribableModel#uninstantiate2: Cannot create control version of class org.jenkinsci.plugins.rundeck.RundeckNotifier using

{includeRundeckLogs=true, jobId=xxxxxxxxxxxxxxxxx, nodeFilters=, options= say=JenkinsPipe , rundeckInstance=Default, shouldFailTheBuild=true, shouldWaitForRundeckJob=true, tags=[], tailLog=true}

java.lang.ClassCastException: org.jenkinsci.plugins.rundeck.RundeckNotifier.tags expects class java.lang.String but received class java.util.ArrayList
at org.jenkinsci.plugins.structs.describable.DescribableModel.coerce(DescribableModel.java:492)
at org.jenkinsci.plugins.structs.describable.DescribableModel.buildArguments(DescribableModel.java:409)
at org.jenkinsci.plugins.structs.describable.DescribableModel.instantiate(DescribableModel.java:329)
Caused: java.lang.IllegalArgumentException: Could not instantiate

{includeRundeckLogs=true, jobId=xxxxxxxxxxxxxxxxxxxxxxxxxxxx, nodeFilters=, options= say=JenkinsPipe , rundeckInstance=Default, shouldFailTheBuild=true, shouldWaitForRundeckJob=true, tags=[], tailLog=true}

for org.jenkinsci.plugins.rundeck.RundeckNotifier
...