Industrial Foregoing Version: 3.6.15

Titanium Version: Sorry I'm noob and don't know that :(

Crashlog If Applicable (Upload to pastebin/gist):

I tried with mob crusher and mob slaughter factory and can't put any range/speed addons into the addon-slots. Tried it with different Tiers too. In case that info helps I'm playing minecraft version 1.21.1 with the modpack craftoria 1.5.0

Did you cheat the items in? You need to craft them or get them from the creative menu

Yes I did. Didn't think that would matter. Thank you very much :)