After installing openwrt to my S3, I cannot access GUI. Please help me. Did i broke my device?
If you installed a snapshot image, there's no UI, by default.
Try to recover what you did, like from still open terminal and browser windows and the downloaded image that you uploaded to router. Write it down, then you and us compare it to official guidance.
https://openwrt.org/toh/etisalat/s3
In best case you start where you mistyped, in worst we call it a brick accident.
How to install GUI then?
And once in snapshot - sysupgrade to back 23.05.4 release.