After finding out that I couldn’t package a game if I didn’t put my custom animgraphnode classes into a custom editor module, I went and created a new set of animgraphnodes to put into the custom editor module (copies of the ones already in the main module, so I could slowly replace them if I got everything working). I have gotten to the point that everything compiles correctly and that I can use the newly created nodes in the editor as well.
When I place them in a blueprint and play the game, there is no problem whatsoever.
However, when I close the editor and then boot it again, I cannot even get past the loading screen before it just crashes at 71% with an exception access violation.
This is really problematic, as I need those custom nodes and I need to be able to package my game as well. Having to choose either one or the other at the moment is simply not an option.