When I run the client, MCreator's console works as expected, printing the output. But, when I either load a world or create a new world, Minecraft is stuck at 0% after the "Loading Terrain" part and before it loads the world. When Minecraft is stuck there, MCreator freezes and I can't access the UI of the program.
MCreator issue tracker has been migrated to GitHub.
Existing tickets have been migrated to GitHub. Please open new tickets on the GitHub tracker instead. If you do not have a GitHub account, all feature requests and bug reports from forums are still considered and checked by the maintainers.