How to fix no login panel issue

I was rolling back from OpenWrt firmware to the old one. It seems ok but when I tried to enter the login panel it was not working. I reset it.
After resetting, the power and LAN LEDs came on, but I could still not enter. The default gateway was rolled back to 192.168.1.1, but I failed to enter there. Using Wireshark software, I discovered that I was failing to enter that IP address.

My router model is TP-Link Archer C6 V3



From what version to which old one?

Can you SSH?

Yes I can ssh through the ip

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once you're ssh'd in, let's see the output of:

ubus call system board

Guessing here, but it is likely that you have a snapshot installed... if so, the following applies (although you may want to use a normal stable release instead):

You have installed a snapshot image. Read the link for instructions how to install Luci, which is not installed by default in snapshots.

https://openwrt.org/faq/can_not_connect_via_webbrowser

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How to hard reset it using ssh?

Doing hard reset would I roll backed to stock firmware?
Or
Can I just upgrade openwrt version using ssh?

From 24.10.0 to 23.05.5

Can i flash again from ssh? What is the procedure?

I use:

cd /tmp
wget <sysupgrade_file_URL>
sha256sum <sysupgrade_file_name> #verify sum
sysupgrade <sysupgrade_file_name>

Using sysupgrade -n will wipe configs.

Solved by bricking the router, restoring stock firmware, and then flashing OpenWrt

I also encountered this problem, and recompiling the firmware did not make it work. And I found that only the Chrome browser would report an error, but Edge was normal.

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