[Bug Report] **Neuron light client after current 2025 update does not Sync**

[Kaytooo1]

Topic Type

Cannot Synchronize

Detail of the issue

Few months ago I updated my Neuron wallet which was working fine to current version and since then it refused to sync. I have been trying for weeks and all I see is 'connecting'. I cleared cache nothing. I uninstalled and reinstalled the wallet, entered by wallet phase key and still does not sync. I checked firewall and it indicate both ckb-light-client.exe and Neuron.

The debug log state following. It keep repeating the same. Please help, Thank you.

[2025-09-14T17:04:22.261Z] [info] Monitor: Restarting ckb process success
[2025-09-14T17:04:22.317Z] [info] CKB Light Runner: process closed
[2025-09-14T17:04:52.009Z] [warn] function call error: TypeError: fetch failed, retry 2 ...
[2025-09-14T17:04:52.120Z] [warn] function call error: TypeError: fetch failed, retry 3 ...
[2025-09-14T17:04:52.234Z] [info] Monitor: is restarting ckb process
[2025-09-14T17:04:52.239Z] [info] CKB Light Runner: config has init, skip init...
[2025-09-14T17:04:52.253Z] [info] CKB Light Runner: ckb light node will start with rpc port 9000, with options [
'run',
'--config-file',
'C:\Users\Lapto\AppData\Roaming\Neuron\chains\light\mainnet\ckb_light.toml'
]
[2025-09-14T17:04:52.265Z] [info] Monitor: Restarting ckb process success
[2025-09-14T17:04:52.292Z] [info] CKB Light Runner: process closed
[2025-09-14T17:05:22.017Z] [warn] function call error: TypeError: fetch failed, retry 2 ...
[2025-09-14T17:05:22.130Z] [warn] function call error: TypeError: fetch failed, retry 3 ...
[2025-09-14T17:05:22.235Z] [info] Monitor: is restarting ckb process
[2025-09-14T17:05:22.242Z] [info] CKB Light Runner: config has init, skip init...
[2025-09-14T17:05:22.259Z] [info] CKB Light Runner: ckb light node will start with rpc port 9000, with options [
'run',
'--config-file',
'C:\Users\Lapto\AppData\Roaming\Neuron\chains\light\mainnet\ckb_light.toml'
]
[2025-09-14T17:05:22.272Z] [info] Monitor: Restarting ckb process success
[2025-09-14T17:05:22.311Z] [info] CKB Light Runner: process closed

bundled-ckb.log

bundled-ckb-light-mainnet.log

main.log

status.log

[Keith-CY]

@walker27 could you please follow up on this issue? It seems that the built-in CKB Light Client is not up.

[walker27]

@Kaytooo1 could you provide the content of the bundled-ckb-light-mainnet.log file?

[Kaytooo1]

@Kaytooo1 could you provide the content of the bundled-ckb-light-mainnet.log file?

Apologies for not been able to get back to you sooner. Please see attached file.

bundled-ckb-lignt-client-mainnet.log

[Kaytooo1]

main.log

@walker27 I also attached main file

[walker27]

@Kaytooo1 Sorry I can't reproduce your problem.
Did you clean up the C:\\Users\\Lapto\\AppData\\Roaming\\Neuron folder when you last reinstalled the app?

[Kaytooo1]

@walker27 No, all I did was click on update via Neuron settings. After the update it would not connect.

If I use Internal Node then it works but I wanted to use Light Client otherwise my computer slows down.

I just notice I now have two Light Clients now with the same port. It wasn't there before and when I select one both are selected and now its syncing. Before I couldn't set start block, only zero but now I could.

[github-actions]

Mark this issue stale because no activity for 60 days

[github-actions]

Close this issue because it's inactive since marked stale