NPC2NPC crash and errors

I’m currently working on a project using the NPC2NPC Convai plugin in Unreal Engine 5.3, featuring two MetaHuman characters (an adult and a child) who interact through AI dialogue.

Please help

I get this errors:

PIE: Play in editor total start time 0,396 seconds.
LogViewport: Scene viewport resized to 1280x720, mode Windowed.
LogScript: Warning: Accessed None trying to read property InitiatorHandler
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0BC1
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property InitiatorHandler”. Node:  Branch Graph:  IsValid Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0BD6
PIE: Error: Blueprint Runtime Error: “Accessed None”. Node:  Branch Graph:  IsValid Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None trying to read property InitiatorHandler
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0C9B
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property InitiatorHandler”. Node:  Interrupt Graph:  EventGraph Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None trying to read property ReceiverHandler
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0AA8
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property ReceiverHandler”. Node:  Branch Graph:  IsValid Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0ABD
PIE: Error: Blueprint Runtime Error: “Accessed None”. Node:  Branch Graph:  IsValid Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None trying to read property ReceiverHandler
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0B82
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property ReceiverHandler”. Node:  Interrupt Graph:  EventGraph Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None trying to read property InitiatorChatbotComponent
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:09C8
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property InitiatorChatbotComponent”. Node:  Unbind Event from On Interrupted Graph:  EventGraph Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None trying to read property InitiatorChatbotComponent
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0A0A
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property InitiatorChatbotComponent”. Node:  Unbind Event from On Transcription Received Graph:  EventGraph Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None trying to read property ReceiverChatbotComponent
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0943
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property ReceiverChatbotComponent”. Node:  Unbind Event from On Interrupted Graph:  EventGraph Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
LogScript: Warning: Accessed None trying to read property ReceiverChatbotComponent
ConvaiNPC2NPC_MGR_C /Game/FirstPerson/Maps/UEDPIE_0_FirstPersonMap.FirstPersonMap:PersistentLevel.ConvaiNPC2NPC_MGR_C_0
Function /Game/NPC2NPC/ConvaiNPC2NPC_MGR.ConvaiNPC2NPC_MGR_C:ExecuteUbergraph_ConvaiNPC2NPC_MGR:0985
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property ReceiverChatbotComponent”. Node:  Unbind Event from On Transcription Received Graph:  EventGraph Function:  Execute Ubergraph Convai NPC2NPC MGR Blueprint:  ConvaiNPC2NPC_MGR
ConvaiChatbotComponentLog: Invoke Speech: Executed | Character ID : 3f759016-689f-11f0-816b-42010a7be01f | Session ID : -1
ConvaiSubsystemLog: Warning: gRPC channel not ready yet.. Current State: GRPC_CHANNEL_IDLE
ConvaiGRPCLog: AsyncGetResponse started | Character ID : 3f759016-689f-11f0-816b-42010a7be01f | Session ID : -1
ConvaiGRPCLog: GRPC GetResponse stream initialized | Character ID : 3f759016-689f-11f0-816b-42010a7be01f | Session ID : -1
ConvaiGRPCLog: request: get_response_config {
character_id: “3f759016-689f-11f0-816b-42010a7be01f”
api_key: “f16077c4c574ab9c814704a159797c3e”
session_id: “-1”
audio_config {
sample_rate_hertz: 16000