From the log you had posted earlier and the youtube video you recorded we noticed that the script is running normally and the openwrt installation was successful.
The output you are getting: md5sum: can’t open ‘/etc/chilli/main.conf’: No such file or directory
root@OpenWrt:~#
is just an warning message. Its not a real error message, it is just displayed for informational purposes. The script was executed successfully.
We would like you to focus in another area that may resolve your issue:
You mentioned you are getting free internet connection but no splash page.
You need to set an IP address/subnet of the router’s LAN NOT EQUALLING the WAN side. So you can either set the device that is providing the internet connection to 192.168.x.1 where x does not equal the Linksys’ LAN subnet, or set the Linksys to 192.168.y.1 where y does not equal 1.
Let us know if you are getting a hotspot splash page after performing the above change.