Sudden error: "No ESLint configuration"

[EugenGedroyc]

The latest versions are installed: the extension in VSCode and the package in npm(9.29.0)
Today myself and a colleague got errors in "Output" for all files in the project:

No ESLint configuration (e.g .eslintrc) found for file: ANY_FILE
File will not be validated. Consider running 'eslint --init' in the workspace folder FOLDER_NAME
Alternatively you can disable ESLint by executing the 'Disable ESLint' command.

In .vscode\settings.json just added:
"eslint.experimental.useFlatConfig": true
and fixed this error: ESlint started to show errors in files again.

I don't know what this is related to, as it doesn't help to roll back to any day's commits and reload the IDE

[dbaeumer]

Can you provide me with a minimal setup that I can clone that demos this. Looks like you are using an older version of ESLint.