Similar to #15
MC 1.16.4
Forge 35.4.36
KubeJS 1604.3.4.143-forge
Architectury 1.3.78-forge

When trying to create a new world, first time the game gives the errors in currently selected datapack error, then if tried a second time it gives the following crash (Trying to proceed in safe mode results in the same error):
https://pastebin.com/XuuS1R7m

Latest: https://cdn.discordapp.com/attachments/359814544090071040/798752079455715338/latest.log
Debug: https://cdn.discordapp.com/attachments/359814544090071040/798752114208669706/debug.log

Alright nevermind, we were just dumb and problem was that GDLauncher can't update projects like Rhino that aren't labeled as forge or fabric.

Not sure if it would be better for third party launchers to support updating mods that aren't labeled with the modloader being used or to just label rhino with all modloaders.