Minecraft Version

1.20.1

Version

1.115.1

Details

I'm using the version 1.115.1 because that's required by the latest version of Valkyrien Skies. However, whenever I try to move a turtle with "go back", "turtle.back()", or similar commands, I get the following error:

Computers seem to also be unable to output redstone signals at all, but don't throw an error for that.

I know you probably don't support older versions, but I was hoping you could offer some advice on how I can fix this, since my modpack isn't compatible with the latest CC:T (1.116.1). Here's my log:
latest.log

EDIT: I tried backdating Forge to its "recommended version", 47.4.0, but it does the same thing.

VS does some mixins into CC:T, see #2261. I'm afraid you may have to fiddle around and try some different versions to see what's compatible. Is it possible for you to update to latest CC:T?

I tried updating CC:T, but Valkyrien Skies complained on startup about the version number and wouldn't let Minecraft load. I'm gonna go to the VS people about it.

As of Valkyrien Skies 2.3.0-beta.10 this issue is properly fixed, although Valkyrien Skies now only supports CC:T 1.115.0 (our compat was too annoying to make work with older versions).

Noted, thanks! It works now, just with the older version of CC:T.