Zaphod beeblebrox

sorry to be an idiot but how do i do that? im not great with technology ... not at all good

I want to use schematica and i have got 1.12.2 forge successfully. then i got LunatriusCore which was also needed and got schematica Yes, i have googled solutions and found nothing succesful. The game crashed whilst initializing game The game crashed whilst initializing game Error: java.lang.NoClassDefFoundError: bnk I was given this message when i tried and failed to load MC sorry if this has been solved just show me where. also please don't use technical language as it won't really help me as id coding.