I get a crash using Ender IO 422

Modpack

https://github.com/GTNewHorizons/NewHorizons

crash log:

https://gist.github.com/Dream-Master/24b0a7182b790ba0db03#file-crash-ender-io

This is the same as #3069

An unsupported base software is installed: 'kcauldron, cauldron, craftbukkit, mcpc'. This is NOT supported.

Yes whe using KCauldron. Why this inst supported ?

it is not exact the same error.

With Ender IO you get support in different levels:

Level 1: It works with Minecraft and the Forge version that is listed in the dependencies.

Level 2: It works with other mods by the same developers.

Level 3: It works with the mods that are directly supported in the version that is listed in the dependencies.

Level 4: It works alongside big mods. It works with newer version of Forge. It works with newer versions of the directly supported mods as long as they don't change their API.

Level 5: It works alongside mods that in turn play nice (use Forge correctly, don't patch Minecraft in a incompatible way, react to bug reports, ...).

Level 6: Everything else that is open source.

Level 7: Everything else that is closed source. Mods that don't play nice.

KCauldron is level 6. That is the first level we call "unsupported", although that distinction is completely arbitrary---the only reason there is any support at all is that some people just do it.

And BTW: It is the same error, just triggered by another FakePlayer on our side.

Ok understand but why version 421 works fine?

Because for 422, the fake player has been tweaked to be more "life-like", this closed a couple of open issues. See #3018

Make it sense to ask on KCauldrons site to ask for a solution ?