Lambda HelloWorld sample : "Error PythonPipBuilder:ResolveDependencies - 'utf-8' codec can't decode byte" running sam build

Try cleaning the build cache and re-building:

sam build --no-cached --debug

The error indicates an issue with encoding when resolving dependencies for the Python 3.12 runtime.

• Ensure your system and Docker installation meet the requirements for Python 3.12, such as Docker version 20.10.10 or higher.
• Verify the SAM CLI version is recent enough to support Python 3.12.
• Check if installing dependencies directly with pip install -r requirements.txt inside a Docker container with the Python 3.12 image has the same issue.
• Try simplifying the template to use a minimal "Hello World" type function without external dependencies at first.
• Consider creating a Lambda layer with your dependencies instead of including them directly in the deployment package.

The Python 3.12 runtime made some changes to return Unicode strings directly instead of escaped sequences, which may cause compatibility issues if other components expect the previous behavior. Updating dependent systems, packages or code to support the new return format could help resolve the problem.

I don't know if it will help, but I used the sam build command in the folder created after sam init and received the above error. My solution is I deleted the contents in the requirements.txt file and built it. It ran without problem.