Running multiple scripts in one App Component error.

I am using a Git repository which builds succesfully. However, the deployment consistently fails due to missing files, even though the App build completed.

This is the simple run command that I use to run both as background process:

python main.py &
python main2.py &

Running one of either files works perfectly fine. But running a second one errors. Sometimes there’s no error and sometimes there’s a ‘file not found’ error.

Has anyone else encountered this or is there a simple solution to this problem? Thanks in advance.