UT4 Mutator with Engine v4.13?

Hello I’ve been trying to follow this tutorial here: A new, community-hosted Unreal Engine Wiki - Announcements and Releases - Unreal Engine Forums, but every time I try to compile, the mutator never shows up in the game and all I get are random failures. I noticed that in that tutorial, the engine they were using was 4.3. Has anything changed in regards to coding mutators from 4.3 to 4.13? Is there a new directory structure for the files and folders to compile? Is there a new way to compile as well? Are there more updated tutorials for scripting (specifically, making a custom weapon for ut4)? Unfortunately, it seems many of the tutorials on coding seem outdated.