Date filter cause docker logstash to crash

Elastic Stack Logstash
1

Hi,

Adding the date filter causes Logstash to crash.
I'm using the premade Logstash docker image, docker.elastic.co/logstash/logstash:7.5.2, I have managed to get the grok filter to work just fine, but when I try to add the date filter for the sake of updating the @timestamp field the container just crashes.

Config code:

    grok
	{
		break_on_match => false
		match => { "message" => "%{TIMESTAMP_ISO8601:timestamp_string},%{INT:log_line} - %{WORD:privilage_level} - %{WORD:log_level} - %{GREEDYDATA:message_string}"}
		match => { "message" => "%{GREEDYDATA:original}"}
		add_tag => ["pl_agent_log"]		
	}

date
	{

	}

    output {
        stdout{}
    }

And here is the output that concerns the error:

[2020-02-10T14:09:56,666][ERROR][logstash.agent           ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"Java::JavaLang::IllegalStateException", :message=>"Unable to configure plugins: (ConfigurationError) translation missing: en.logstash.agent.configuration.invalid_plugin_register", :backtrace=>["org.logstash.config.ir.CompiledPipeline.<init>(CompiledPipeline.java:119)", "org.logstash.execution.JavaBasePipelineExt.initialize(JavaBasePipelineExt.java:60)", "org.logstash.execution.JavaBasePipelineExt$INVOKER$i$1$0$initialize.call(JavaBasePipelineExt$INVOKER$i$1$0$initialize.gen)", "org.jruby.internal.runtime.methods.JavaMethod$JavaMethodN.call(JavaMethod.java:837)", "org.jruby.ir.runtime.IRRuntimeHelpers.instanceSuper(IRRuntimeHelpers.java:1156)", "org.jruby.ir.runtime.IRRuntimeHelpers.instanceSuperSplatArgs(IRRuntimeHelpers.java:1143)", "org.jruby.ir.targets.InstanceSuperInvokeSite.invoke(InstanceSuperInvokeSite.java:39)", "usr.share.logstash.logstash_minus_core.lib.logstash.java_pipeline.RUBY$method$initialize$0(/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:27)", "org.jruby.internal.runtime.methods.CompiledIRMethod.call(CompiledIRMethod.java:91)", "org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:90)", "org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:332)", "org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:86)", "org.jruby.RubyClass.newInstance(RubyClass.java:915)", "org.jruby.RubyClass$INVOKER$i$newInstance.call(RubyClass$INVOKER$i$newInstance.gen)", "org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:183)", "usr.share.logstash.logstash_minus_core.lib.logstash.pipeline_action.create.RUBY$method$execute$0(/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb:36)", "usr.share.logstash.logstash_minus_core.lib.logstash.pipeline_action.create.RUBY$method$execute$0$__VARARGS__(/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb)", "org.jruby.internal.runtime.methods.CompiledIRMethod.call(CompiledIRMethod.java:91)", "org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:90)", "org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:183)", "usr.share.logstash.logstash_minus_core.lib.logstash.agent.RUBY$block$converge_state$2(/usr/share/logstash/logstash-core/lib/logstash/agent.rb:326)", "org.jruby.runtime.CompiledIRBlockBody.callDirect(CompiledIRBlockBody.java:136)", "org.jruby.runtime.IRBlockBody.call(IRBlockBody.java:77)", "org.jruby.runtime.Block.call(Block.java:129)", "org.jruby.RubyProc.call(RubyProc.java:295)", "org.jruby.RubyProc.call(RubyProc.java:274)", "org.jruby.RubyProc.call(RubyProc.java:270)", "org.jruby.internal.runtime.RubyRunnable.run(RubyRunnable.java:105)", "java.base/java.lang.Thread.run(Thread.java:834)"]}
warning: thread "Converge PipelineAction::Create<main>" terminated with exception (report_on_exception is true):
LogStash::Error: Don't know how to handle `Java::JavaLang::IllegalStateException` for `PipelineAction::Create<main>`
          create at org/logstash/execution/ConvergeResultExt.java:109
             add at org/logstash/execution/ConvergeResultExt.java:37
  converge_state at /usr/share/logstash/logstash-core/lib/logstash/agent.rb:339


[2020-02-10T14:09:56,679][ERROR][logstash.agent           ] An exception happened when converging configuration {:exception=>LogStash::Error, :message=>"Don't know how to handle `Java::JavaLang::IllegalStateException` for `PipelineAction::Create<main>`", :backtrace=>["org/logstash/execution/ConvergeResultExt.java:109:in `create'", "org/logstash/execution/ConvergeResultExt.java:37:in `add'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:339:in `block in converge_state'"]}


[2020-02-10T14:09:56,759][FATAL][logstash.runner          ] An unexpected error occurred! {:error=>#<LogStash::Error: Don't know how to handle `Java::JavaLang::IllegalStateException` for `PipelineAction::Create<main>`>, :backtrace=>["org/logstash/execution/ConvergeResultExt.java:109:in `create'", "org/logstash/execution/ConvergeResultExt.java:37:in `add'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:339:in `block in converge_state'"]}


[2020-02-10T14:09:56,818][ERROR][org.logstash.Logstash    ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit

Also an additional minor question, I'm trying to follow the Elastic Common Scheme, which has field names like, log.level, but I seem to be unable to assign a field name with a punctuation, ".", in it. Any attempts of naming it log.level results in

  "log": {
    "level": "VALUE"
  }
2

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