pydotplus.graphviz .InvocationException: GraphViz's executables not found

Hey Guys,

I'm trying to set up the tool in python, but when i try to execute "pytest --cov-report html --cov=bpmn_python", it simply doesnt work. At first I had the same error as everyone else (Graph and nodes), but after fixing it, the one above appeared. Anyone keen to help? Thank you in advance!