Flint2: can't access web UI after update

Hello there, I have updated to 4.6.4 and now I can't access to the webUI, neither on my custom or original port. What can I do to not loose all my configuration?
Thanks

No guarantees but can you tell the steps of the update process and also when you plugged out the router (when in case you did).

If the led was off, and then turned on and was able to be alive for a certain time of seconds then maybe you have luck.

what is the output of ipconfig /all ?

You could try setting up a static ip and see if that connects to 'save' a backup?

Also if there is a network switch involved, if possible try a direct connection or make sure the switch starts after the router, some switches especially those from tp-link don't play nice they can mismatch origins and destinations which mean the router blocks it because it sees traffic from itself with the same source mac address.

Could you access the Luci page?

http://[RouterIP]/cgi-bin/luci

dhcp, wifi, internet and all the others things are working fine. Only the webUI is not working

Nope, both webUI are not working

Have you tried with incognito mode or a different browser?

It sound like a caching issue.

Or did you flash a snapshot image from openwrt directly?

These do not come with luci you need to ssh to install it.

opkg update
opkg install luci

That will give back the ui

Can you ssh to the router and get the log?

cat /var/log/nginx/error.log
logread

I just installed the 4.6.4 with the update function of the router. Few weeks ago I was on 4.6.4 beta then revert to 4.6.2 because package manager wasn't working anymore. But never used snapshot openwrt, always official GLInet

EDIT: Yes, I tried with different browser (Chrome, Brave and Firefox) and 2 differents PC

Sorry, I was at work and couldn't reach home because my home network was down, and I don't know why because 1hr before it was working. Now I'm back and the Flint2 was blinking constantly, I tried to reboot it but nothing happened.I need to keep the reset button pressed and restore default settings. Now I restore my preavious configuration backup from 4.6.2. Anyway that's totally not user friendly if any update can broke something....

But if I want to restore it mostly near to factory setting, how can I restore my configuration? Mostly I would like to keep: WiFi passwords, MAC-IP association, DDNS and DHCP configuration

Only by removing the files from your backup which you don't want to get restored. It is more or less painful, based on how many settings you want to restore / not restore.

Would not recommend it.

Ok, thanks for the info. Anyway I have just downgraded to 4.6.2 because Luci interface was not working on 4.6.4 after the restore of my 4.6.2 backup (500 internal server error),.

But if every firmware update I need to be afraid to do again all my steps to configure my network I must find some way to do everything via SSH and just input all as sequential steps. Or find a way to backup and restore only what I need, but I suppose this can create anyway some errors. That's why I'm moving some of my needed on docker running on my NAS.

Constanting flash mean that the router boot but do not have Internet.

If could get the log should find the reason. But I hope you can just use 4.6.4 because it has important fixes.

My Flint 2 4.6.4 works fine now.

Probably something broke when I applied my 4.6.2 backup to the 4.6.4 firmware. I will try again when I can reserve time and post logs here. Thanks

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