I have a Xiaomi Router 3G running openwrt 18.06. I configured it using Luci, and this worked fine. However, after a few days, Luci is not available anymore. SSH works and the router does its job, I just cannot access Luci (tried on multiple browsers, PC, etc.). Chrome gives me an error "ERR_CONNECTION_RESET" or "ERR_CONNECTION_REFUSED"
I have reset the router completely and now it happened again after some days of usage. How can I reactive Luci? I tried rebooting the router, reinstalling Luci, but none of those things work.
Any commands I can use via SSH to get Luci to work again?