I have problem with face overlay filter

OpenVidu v2 Issues developing apps
1

i can use filters which are in tutorials except faceoverlay

it causes error like this

[Error] ERROR:org.kurento.client.internal.server.KurentoServerException:Unexpected error while processing method: /build/opencv-L2vuMj/opencv-3.2.0+dfsg/modules/core/src/persistence.cpp:6628: error: (-2) The node does not represent a user object (unknown type?) in function cvRead
 (Code:-32603, Type:null, Data: null) in Request: method:applyFilter params:{"streamId":"str_CAM_ArDJ_con_XXya0upeL9","type":"FaceOverlayFilter","options":"{}"} request:undefined
	(익명 함수) (openvidu-browser-2.22.0.js:12312)
	(익명 함수) (openvidu-browser-2.22.0.js:11277)
	dispatchCallback (openvidu-browser-2.22.0.js:11847)
	processResponse (openvidu-browser-2.22.0.js:11937)
	(익명 함수) (openvidu-browser-2.22.0.js:11978)
	transportMessage (openvidu-browser-2.22.0.js:11626)
[Error] ERROR DATA:"org.kurento.client.internal.server.KurentoServerException: Unexpected error while processing method: /build/opencv-L2vuMj/opencv-3.2.0+dfsg/modules/core/src/persistence.cpp:6628: error: (-2) The node does not represent a user object (unknown type?) in function cvRead\n (Code:-32603, Type:null, Data: null)\n\tat org.kurento.client.internal.transport.jsonrpc.RomClientJsonRpcClient.sendRequest(RomClientJsonRpcClient.java:264)\n\tat org.kurento.client.internal.transport.jsonrpc.RomClientJsonRpcClient.create(RomClientJsonRpcClient.java:157)\n\tat org.kurento.client.internal.transport.jsonrpc.RomClientJsonRpcClient.create(RomClientJsonRpcClient.java:147)\n\tat org.kurento.client.internal.client.RomManager.create(RomManager.java:59)\n\tat org.kurento.client.internal.client.RomManager.createWithKurentoObject(RomManager.java:257)\n\tat org.kurento.client.AbstractBuilder.build(AbstractBuilder.java:65)\n\tat io.openvidu.server.kurento.core.KurentoSessionManager.applyFilterInPublisher(KurentoSessionManager.java:1342)\n\tat io.openvidu.server.kurento.core.KurentoSessionManager.applyFilter(KurentoSessionManager.java:929)\n\tat io.openvidu.server.rpc.RpcHandler.applyFilter(RpcHandler.java:533)\n\tat io.openvidu.server.rpc.RpcHandler.handleRequest(RpcHandler.java:162)\n\tat org.kurento.jsonrpc.internal.JsonRpcHandlerManager.handleRequest(JsonRpcHandlerManager.java:142)\n\tat org.kurento.jsonrpc.internal.server.ProtocolManager$3.run(ProtocolManager.java:218)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)\n\tat java.base/java.lang.Thread.run(Thread.java:829)\n"
	(익명 함수) (openvidu-browser-2.22.0.js:12312)
	(익명 함수) (openvidu-browser-2.22.0.js:11281)
	dispatchCallback (openvidu-browser-2.22.0.js:11847)
	processResponse (openvidu-browser-2.22.0.js:11937)
	(익명 함수) (openvidu-browser-2.22.0.js:11978)
	transportMessage (openvidu-browser-2.22.0.js:11626)

how can i fix this?