It looks like the Docker container was downgraded to python 2.7 which gives this error when using python 3.8:
Build Failed
Error: PythonPipBuilder:Validation - Binary validation failed for python, searched for python in following locations : ['/usr/local/bin/python'] which did not satisfy constraints for runtime: python3.8. Do you have python for runtime: python3.8 on your PATH?
It looks like the Docker container was downgraded to python 2.7 which gives this error when using python 3.8:
Build Failed Error: PythonPipBuilder:Validation - Binary validation failed for python, searched for python in following locations : ['/usr/local/bin/python'] which did not satisfy constraints for runtime: python3.8. Do you have python for runtime: python3.8 on your PATH?