@ChrisUK The service they are providing in my country is pretty bad. No one replies to the emails and the tech support doesn't answer the calls, If somehow they answer the call they will just tell you to change the adapter or they will replace your unit. The service is really bad so I came here asking for help because people over here know more than the tech support. @Sunshine was kind enough to connect me with their Engineer.

If you are getting the same Exception error as I got then changing the router won't work as I have replaced 3 routers and the problem still persisted. The new router will come with the same firmware and they haven't updated the fix on the firmware download page. I'd suggest you to DM a staff over here or @Sunshine and link them this thread so they will put you in contact with someone that knows how to deal with this. And I wouldn't buy TP-Link products in the future. It took me over 4 months to get this fixed and the provided firmware comes with a watermark and it's been months but there's no official update, and traveling back and forth to the service center for 3 months costed me more than the two routers I bought.

  @SaurabhS I have dropped @Sunshine a message, will see if can avoid spending the money constantly returning a router which has a software bug and otherwise the hardware is fine.

##########################################################################
#                    Archer C64  System Log 
# Time = 2023-10-30 15:11:53 845s
# H-Ver = Archer C64 1.0 : S-Ver = 1.13.2 Build 230824 Rel.74702n(4555)
# L = 192.168.1.1 : M = 255.255.255.0
# WAN = DHCP : W = 192.168.0.45 : M = 255.255.255.0 : G = 192.168.0.1
# Cnt = 10624, Free = 10564, Busy = 60
##########################################################################
  0days, 00:00:05, [tmpd]register tmp app, type: 1
  0days, 00:00:05, [portal]portal init

  0days, 00:00:05, [lan]LAN: Set interface br-lan0 ip=192.168.1.1 netmask 255.255.255.0.
  0days, 00:00:05, [tmpd]register tmp app, type: 2
  0days, 00:00:06, [tmpd]register tmp app, type: 4
  0days, 00:00:29, [DSLite]Dslite disable
  0days, 00:00:29, [portal]portal not enabled

  0days, 00:00:29, [portal]portal stop

  0days, 00:00:29, [httpd]Http server start!
  0days, 00:00:41, [wan]Wan ethernet port plug on.
  0days, 00:00:41, [dhcpc]Send DISCOVER with unicast flag 0
  0days, 00:00:42, [dhcpc]Recv OFFER from server 192.168.0.1 with ip 192.168.0.45
  0days, 00:00:42, [dhcpc]Send REQUEST to server 192.168.0.1 with request ip 192.168.0.45
  0days, 00:00:42, [dhcpc]eth0 set ip 192.168.0.45 mask 255.255.255.0 gateway 192.168.0.1
  0days, 00:00:42, [wan]advanced ddns -wanChanged
  0days, 00:00:42, [wan]systool sntpc -sntpRequest
  0days, 00:00:42, [dnsproxy]Register Dns Detect
  0days, 00:00:42, [dnsproxy]Register primary = 0x6404a8c2, secondary = 0x6408a8c2
  0days, 00:00:42, [inetd]INETD: select error, abort.
  0days, 00:00:42, [cwmp]cwmp is not start
  0days, 00:02:43, [dhcps]Send OFFER with ip 192.168.1.101.
  0days, 00:02:44, [dhcps]Send ACK to 192.168.1.101.

Exception:|2023-10-24 19:04:08|
Assertion failed: &pppParams == params || &ppp6Params == params, file ./ppp/pppLib.c, line 868
.->[404d9de4]->[404e7ca8]->[4039cf74]->[40534780]->[40218d9c]->[40218abc]->[404dc424]->[40480128]->[4053a278]->[40536770]->[40542108]->[40541f10]
Exception:|2023-10-25 18:45:26|
Assertion failed: &pppParams == params || &ppp6Params == params, file ./ppp/pppLib.c, line 868
.->[404d9de4]->[404e7ca8]->[4039cf74]->[40534780]->[40218d9c]->[40218abc]->[404dc424]->[40480128]->[4053a278]->[40536770]->[40542108]->[40541f10]
Exception:|2023-10-26 19:10:40|
Assertion failed: &pppParams == params || &ppp6Params == params, file ./ppp/pppLib.c, line 868
.->[404d9de4]->[404e7ca8]->[4039cf74]->[40534780]->[40218d9c]->[40218abc]->[404dc424]->[40480128]->[4053a278]->[40536770]->[40542108]->[40541f10]
Exception:|2023-10-27  8:57:45|
Assertion failed: &pppParams == params || &ppp6Params == params, file ./ppp/pppLib.c, line 868
.->[404d9de4]->[404e7ca8]->[4039cf74]->[40534780]->[40218d9c]->[40218abc]->[404dc424]->[40480128]->[4053a278]->[40536770]->[40542108]->[40541f10]
Exception:|2023-10-27 22:57:29|
Assertion failed: &pppParams == params || &ppp6Params == params, file ./ppp/pppLib.c, line 868
.->[404d9de4]->[404e7ca8]->[4039cf74]->[40534780]->[40218d9c]->[40218abc]->[404dc424]->[40480128]->[4053a278]->[40536770]->[40542108]->[40541f10]
Exception:|2023-10-28 11:59:46|
Assertion failed: &pppParams == params || &ppp6Params == params, file ./ppp/pppLib.c, line 868
.->[404d9de4]->[404e7ca8]->[4039cf74]->[40534780]->[40218d9c]->[40218abc]->[404dc424]->[40480128]->[4053a278]->[40536770]->[40542108]->[40541f10]
Exception:|2023-10-29  1:37:05|
Assertion failed: &pppParams == params || &ppp6Params == params, file ./ppp/pppLib.c, line 868
.->[404d9de4]->[404e7ca8]->[4039cf74]->[40534780]->[40218d9c]->[40218abc]->[404dc424]->[40480128]->[4053a278]->[40536770]->[40542108]->[40541f10]
Exception:|2023-10-30 14:57:36|
Assertion failed: &pppParams == params || &ppp6Params == params, file ./ppp/pppLib.c, line 868
.->[404d9de4]->[404e7ca8]->[4039cf74]->[40534780]->[40218d9c]->[40218abc]->[404dc424]->[40480128]->[4053a278]->[40536770]->[40542108]->[40541f10]
 

  @Sunshine No problem at all :)

Hopefully add enough detail here:

1. Virgin media, but its just used to connect to a hub that is shared amongst others. I have no control of that part. I hardwire connect on someone elses LAN port.

2. It is completely random, typically once a day is normal and from the log attached in the other post - it's always the same error.

3. Usually 2 or 3 of devices at the most - not shared amongst anyone but myself. 

4. Been using since the end of September when received it.

Thank you  @Sunshine . The engineer is in contact and looking at the problem now :) 

@Sunshine 

  @Sunshine Just an update. No issues for 6 days since working through and applying a fix from the engineer dealing with -  the errors mentioned are no longer in logged and not had any issues all week. :)