I have a router ER605v2 at a friend's house that has suddenly started giving a lot of error messages.
does anyone know what Device response timed out. (ErrorCode: gateway_-6) means?
I have an ER605v2 with the same firmware on another controller without these problems

these messages are under Configuration Result and failed on the controller.

controller version is 6.0.23 and Router firmware is 2.3.0 Build 20250826 Rel.41004

all is EA release.

The router is restarted every night, everything is also powered off.

here are the messages.

    
Ports
 (5)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Hardware Offload
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Bandwidth Control
 (2)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Time Zone
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
DNS Proxy
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Remote Logging
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Online Detection Interval
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
IP Group
 (6)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Device Account
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Gateway QoS Service
 (12)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
IPTV
 (2)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
IP-Port Group
 (1)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Policy Routing
 (3)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Attack Defense
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
LLDP
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Device Management Hostname/IP
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Location Group
 (3)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Dynamic DNS
 (1)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Device Name
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
LAN Networks
 (3)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
WAN-IPv6
 (2)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
SSH
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Daylight Saving Time
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
IPv6 Group
 (1)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Application Control
 (1)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Access Control
 (2)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Session Limit
 (1)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
ACL
 (3)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
VPN
 (3)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
WAN Mode
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Link Speed
 (5)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
WAN-IPv4
 (2)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
UPnP
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
MAC Filtering
 (1)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
DNS Cache
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Mirror
 (5)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Firewall
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Echo Server
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
ALG
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Load Balancing
 (2)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
DHCP Reservation
 (2)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
VPN User
 (3)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Wireguard
 (5)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
LED
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
SNMP
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Port Forwarding
 (6)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
Internet
 (2)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)
IP-MAC Binding
 (1)
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Sep 22, 2025 09:09:56
Device response timed out. (ErrorCode: gateway_-6)