The resource was made available via an external link to a GitLab ci artifact. This seemed to create problems when trying to download the jar. Not the actual jar is directly saved.
This update provides the important feature of saving and loading player data when a player gets added to the gamemode. The new feature ensures that after a player gets removed from the gamemode he will get his old inventory, teleported to his old location and old gamemode gets restored.
Furthermore some bug fixes have happened and the artifact id was corrected.