Mod doesnt work right

Hello! im sorry for bothering you guys, we downloaded (my friend and i) the version of decocraft that the server allowed us to use, but it doesnt work right, it gets pretty bugged and it gives us some screen flickering, some of the items turn invisible and also the blocks around these items after they've been placed, we tried with another version of the mod to see if we were the problem (bc it also happened on singleplayer) but other versions of that mod were just fine, is there a way we or you can fix that? we really want to use that mod! thank you so much for your time and for what you do guys!

Oh, and obviously, the server doesnt allow me to use another version of this mod so yeah

NEVERMIND IM SORRY, i downloaded Optifine and it seemed to fix it , Sorry for making you loose your timmmee