This is my first GitHub page; I have created repository and even pasted my project into it, but when I enter the URL it gives me 404 error with "There isn't a GitHub Pages site here" description. My project called 'weather-app' and the URL: https://salehghari.github.io/
So it should be like this: https://salehghari.github.io/weather-app/weatherapp.html
I checked your repository on Github and all the Builds under Actions are marked as Failure with the following error under Deploy:
Error: No uploaded artifact was found!
Under Build I see this:
Error: fatal: No url found for submodule path 'weather-app' in .gitmodules Error: The process '/usr/bin/git' failed with exit code 128
You are using a submodule but I don't see a clickable link on the repository, are you sure that is correct ? Check if this submodule is correct, there is also an issue on Github Community about this topic.