I have the same issue on GL-B1300 with 3.212 firmware…
I’m unable to login to Luci web interface, nor SSH.
Message:
Please enter your username and password.
Invalid username and/or password! Please try again.
I tried reinstalling Luci as suggested:
Version Information: git-20.356.08465-e96d522-1
Status: installed successfully
Stdout: Removing package luci-mod-rpc from root...
Removing package luci-base from root...
Installing luci-mod-rpc (git-20.356.08465-e96d522-1) to root...
Downloading http://download.gl-inet.com/releases/qsdk_v11/packages-3.x/ipq40xx/luci/luci-mod-rpc_git-20.356.08465-e96d522-1_all.ipk
Installing luci-base (git-20.356.08465-e96d522-1) to root...
Downloading http://download.gl-inet.com/releases/qsdk_v11/packages-3.x/ipq40xx/luci/luci-base_git-20.356.08465-e96d522-1_ipq.ipk
Installing luci (git-20.356.08465-e96d522-1) to root...
Downloading http://download.gl-inet.com/releases/qsdk_v11/packages-3.x/ipq40xx/luci/luci_git-20.356.08465-e96d522-1_all.ipk
Configuring luci-mod-rpc.
Configuring luci-base.
Configuring luci.
I don’t have this issue on my other router GL-AR750 (also 3.212 firmware), and both Luci web interface, and SSH login work, but versions are slightly different there…
Powered by LuCI openwrt-19.07 branch (git-21.189.23240-7b931da) / OpenWrt 19.07.8 r11364-ef56c85848
Ok, I just changed admin password to different one, and back to one that didn’t work before, and both login to Luce, and SSH work now. So it might be something with update?