The course is too old and doesn't work well.
In the case of YouTube tutorials like "Learn how to make Games: Unity and Playmaker (Part 4)", it's even more difficult to follow due to version issues.
The course updates are not keeping up with Unity versions.
Where can we find error-free tutorials?
I completely understand your frustration with outdated tutorials it can be really difficult to follow them with newer Unity and Playmaker versions.
One channel that helped me a lot is
Philip Herlitz. His videos were incredibly useful, and I learned most of Playmaker from them. He even has tutorials on making 3D games and integrating Playmaker with PUN2 for multiplayer functionality.
Additionally, you might find the official Playmaker documentation helpful as it’s often updated:
Playmaker Documentation.
If you’re stuck with specific challenges, feel free to share! I’d be happy to help further.
