Thank you for your help.
Thank you for taking a look at my question.
I created a new LookML project automatically using the schema information of the database I was connecting to, and then created an empty Github remote repository and connected it to the LookML project without any configuration changes.
Then I lost all the code in the LookML project. Is this a bug?
If it is not a bug, I would like to know how to fix it.
Thank you in advance.