Unknown error was occurred when I was trying to save objects to the repository

When I try to save test-case, I saw this error (on screenshot)
And what I see in log-file:

!ENTRY org.eclipse.e4.ui.workbench 2 0 2018-09-05 08:51:33.766
!MESSAGE Websocket closed because of: CloseReason[1005]
org.eclipse.jetty.server.Server@15cb334 - STARTED
+= qtp9020449{STARTED,8<=8<=200,i=2,q=0} - STARTED
| +- 111 qtp9020449-111 TIMED_WAITING @ sun.misc.Unsafe.park(Native Method) IDLE
| +- 117 qtp9020449-117 TIMED_WAITING @ sun.misc.Unsafe.park(Native Method) IDLE
| +- 115 qtp9020449-115-acceptor-0@1e0b443-ServerConnector@127530f{HTTP/1.1,[http/1.1]}{0.0.0.0:50001} RUNNABLE @ sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) prio=3
| +- 110 qtp9020449-110 RUNNABLE @ sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
| +- 116 qtp9020449-116 RUNNABLE @ sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
| +- 113 qtp9020449-113 RUNNABLE @ sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
| +- 112 qtp9020449-112-acceptor-0@197a386-ServerConnector@1505a84{HTTP/1.1,[http/1.1]}{0.0.0.0:50000} RUNNABLE @ sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) prio=3
| +- 114 qtp9020449-114 RUNNABLE @ sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
+= ServerConnector@1505a84{HTTP/1.1,[http/1.1]}{0.0.0.0:50000} - STARTED
| +~ org.eclipse.jetty.server.Server@15cb334 - STARTED
| +~ qtp9020449{STARTED,8<=8<=200,i=2,q=0} - STARTED
| += org.eclipse.jetty.util.thread.ScheduledExecutorScheduler@4e4640 - STARTED
| +- org.eclipse.jetty.io.ArrayByteBufferPool@af3aac
| += HttpConnectionFactory@71cf51[HTTP/1.1] - STARTED
| | +- HttpConfiguration@388982{32768/8192,8192/8192,https://:0,}
| += org.eclipse.jetty.server.ServerConnector$ServerConnectorManager@47b21a - STARTED
| | += org.eclipse.jetty.io.ManagedSelector@16c04ac id=0 keys=0 selected=0 id=0
| | | +- sun.nio.ch.WindowsSelectorImpl@ac7aa8 keys=0
| | += org.eclipse.jetty.io.ManagedSelector@192ff7 id=1 keys=0 selected=0 id=1
| | +- sun.nio.ch.WindowsSelectorImpl@12abc70 keys=0
| +- sun.nio.ch.ServerSocketChannelImpl[/0:0:0:0:0:0:0:0:50000]
| +- qtp9020449-112-acceptor-0@197a386-ServerConnector@1505a84{HTTP/1.1,[http/1.1]}{0.0.0.0:50000}
+= ServerConnector@127530f{HTTP/1.1,[http/1.1]}{0.0.0.0:50001} - STARTED
| +~ org.eclipse.jetty.server.Server@15cb334 - STARTED
| +~ qtp9020449{STARTED,8<=8<=200,i=2,q=0} - STARTED
| += org.eclipse.jetty.util.thread.ScheduledExecutorScheduler@1734c7b - STARTED
| +- org.eclipse.jetty.io.ArrayByteBufferPool@ebc8af
| += HttpConnectionFactory@764d18[HTTP/1.1] - STARTED
| | +- HttpConfiguration@161674a{32768/8192,8192/8192,https://:0,}
| += org.eclipse.jetty.server.ServerConnector$ServerConnectorManager@155bae - STARTED
| | += org.eclipse.jetty.io.ManagedSelector@1e8bc4c id=0 keys=0 selected=0 id=0
| | | +- sun.nio.ch.WindowsSelectorImpl@672b3d keys=0
| | += org.eclipse.jetty.io.ManagedSelector@1cca7ae id=1 keys=0 selected=0 id=1
| | +- sun.nio.ch.WindowsSelectorImpl@13ee1fd keys=0
| +- sun.nio.ch.ServerSocketChannelImpl[/0:0:0:0:0:0:0:0:50001]
| +- qtp9020449-115-acceptor-0@1e0b443-ServerConnector@127530f{HTTP/1.1,[http/1.1]}{0.0.0.0:50001}
+= o.e.j.s.ServletContextHandler@115df6a{/,null,AVAILABLE} - STARTED
| += org.eclipse.jetty.server.session.SessionHandler@1c3380d - STARTED
| | += org.eclipse.jetty.server.session.HashSessionManager@1bad9af - STARTED
| | | += org.eclipse.jetty.util.thread.ScheduledExecutorScheduler@1a3e9a5 - STARTED
| | | | +- sun.misc.Unsafe.park(Native Method)
| | | | +- java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
| | | | +- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
| | | | +- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
| | | | +- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
| | | | +- java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
| | | | +- java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
| | | | +- java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
| | | | +- java.lang.Thread.run(Thread.java:748)
| | | +~ org.eclipse.jetty.server.session.HashSessionIdManager@192c5a8 - STARTED
| | += org.eclipse.jetty.servlet.ServletHandler@f5b63f - STARTED
| | += Jetty_WebSocketUpgradeFilter - STARTED
| | | +- contextAttributeKey=org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter
| | | +- pathmap=PathMappings[size=1]
| | | +- MappedResource[pathSpec=UriTemplatePathSpec[“/”,pathDepth=1,group=EXACT],resource=org.eclipse.jetty.websocket.jsr356.server.JsrCreator[metadata=AnnotatedServerEndpointMetadata[endpoint=@javax.websocket.server.ServerEndpoint(encoders=, configurator=class javax.websocket.server.ServerEndpointConfig$Configurator, decoders=, subprotocols=, value=/),config=AnnotatedServerEndpointConfig[endpointClass=class com.kms.katalon.objectspy.websocket.AddonSocket,path=/,decoders=,encoders=,subprotocols=,extensions=]]]]
| | +- [/*]/==1=>Jetty_WebSocketUpgradeFilter
| | += org.eclipse.jetty.servlet.ServletHandler$Default404Servlet-11436e5@ab314e13==org.eclipse.jetty.servlet.ServletHandler$Default404Servlet,-1,true - STARTED
| | +- [/]=>org.eclipse.jetty.servlet.ServletHandler$Default404Servlet-11436e5
| += org.eclipse.jetty.websocket.jsr356.server.ServerContainer@d6e63c - STARTED
| | += org.eclipse.jetty.websocket.client.WebSocketClient@f63c12 - STARTED
| | += org.eclipse.jetty.websocket.server.WebSocketServerFactory@74ce02 - STARTED
| | += org.eclipse.jetty.util.thread.ScheduledExecutorScheduler@166750 - STARTED
| | +- org.eclipse.jetty.io.MappedByteBufferPool@1cefae1
| | += WebSocketSession[websocket=JsrAnnotatedEventDriver[websocket=com.kms.katalon.objectspy.websocket.AddonSocket@3dfee9],behavior=SERVER,connection=WebSocketServerConnection@E018A7CD{endp=SelectChannelEndPoint@15686f6{/127.0.0.1:64828<->50000,Open,in,out,FI,-,108/300000,WebSocketServerConnection@e018a7cd}{io=1/1,kio=1,kro=1},ios=IOState@19e2c81[OPEN,in,out],f=Flusher[queueSize=0,aggregateSize=0,failure=null],g=Generator[SERVER,validating],p=Parser@7f436d[ExtensionStack,s=START,c=0,len=76,f=null]},remote=WebSocketRemoteEndpoint@1e39f51[batching=true],incoming=JsrAnnotatedEventDriver[websocket=com.kms.katalon.objectspy.websocket.AddonSocket@3dfee9],outgoing=ExtensionStack[queueSize=0,extensions=,incoming=org.eclipse.jetty.websocket.jsr356.JsrSession,outgoing=org.eclipse.jetty.websocket.server.WebSocketServerConnection]] - STARTED
| | +- incomingHandler : JsrAnnotatedEventDriver[websocket=com.kms.katalon.objectspy.websocket.AddonSocket@3dfee9]
| | +- outgoingHandler : ExtensionStack[queueSize=0,extensions=,incoming=org.eclipse.jetty.websocket.jsr356.JsrSession,outgoing=org.eclipse.jetty.websocket.server.WebSocketServerConnection] - STARTED
| | +- Stack
| | +- Network : WebSocketServerConnection@E018A7CD{endp=SelectChannelEndPoint@15686f6{/127.0.0.1:64828<->50000,Open,in,out,FI,-,122/300000,WebSocketServerConnection@e018a7cd}{io=1/1,kio=1,kro=1},ios=IOState@19e2c81[OPEN,in,out],f=Flusher[queueSize=0,aggregateSize=0,failure=null],g=Generator[SERVER,validating],p=Parser@7f436d[ExtensionStack,s=START,c=0,len=76,f=null]}
| | +- Websocket: WebSocketSession[websocket=JsrAnnotatedEventDriver[websocket=com.kms.katalon.objectspy.websocket.AddonSocket@3dfee9],behavior=SERVER,connection=WebSocketServerConnection@E018A7CD{endp=SelectChannelEndPoint@15686f6{/127.0.0.1:64828<->50000,Open,in,out,FI,-,125/300000,WebSocketServerConnection@e018a7cd}{io=1/1,kio=1,kro=1},ios=IOState@19e2c81[OPEN,in,out],f=Flusher[queueSize=0,aggregateSize=0,failure=null],g=Generator[SERVER,validating],p=Parser@7f436d[ExtensionStack,s=START,c=0,len=76,f=null]},remote=WebSocketRemoteEndpoint@1e39f51[batching=true],incoming=JsrAnnotatedEventDriver[websocket=com.kms.katalon.objectspy.websocket.AddonSocket@3dfee9],outgoing=ExtensionStack[queueSize=0,extensions=,incoming=org.eclipse.jetty.websocket.jsr356.JsrSession,outgoing=org.eclipse.jetty.websocket.server.WebSocketServerConnection]]
| |
| +> No ClassLoader
| +> Handler attributes o.e.j.s.ServletContextHandler@115df6a{/,null,AVAILABLE}
| | +- org.eclipse.jetty.server.Executor=qtp9020449{STARTED,8<=8<=200,i=2,q=0}
| | +- org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter=WebSocketUpgradeFilter[factory=org.eclipse.jetty.websocket.server.WebSocketServerFactory@74ce02,pathmap=PathMappings[size=1]]
| | +- javax.websocket.server.ServerContainer=org.eclipse.jetty.websocket.jsr356.server.ServerContainer@d6e63c
| +> Context attributes o.e.j.s.ServletContextHandler@115df6a{/,null,AVAILABLE}
| | +- org.eclipse.jetty.util.DecoratedObjectFactory=org.eclipse.jetty.util.DecoratedObjectFactory[decorators=1]
| +> Initparams o.e.j.s.ServletContextHandler@115df6a{/,null,AVAILABLE}
+= org.eclipse.jetty.server.session.HashSessionIdManager@192c5a8 - STARTED
|
+> org.eclipse.osgi.internal.loader.EquinoxClassLoader@9f7ce2[org.eclipse.jetty.server:9.3.9.v20160517(id=235)]
+- org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor$1@16edc99
сен 05, 2018 8:51:42 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS

Who knows, what’s wrong? I,also, attached full log.

Screenshot_5.png

.log

I deleted .metadata folder, but it doesn’t help.

Here is katalon.ini settings:
-startup
plugins/org.eclipse.equinox.launcher_1.3.201.v20161025-1711.jar
–launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.401.v20161122-1740
-data
config
-vmargs
-Xms256m
-Xmx1280m

I reinstalled JDK 8 and updated Katalon to version 5.7.0. That helped.

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