Hello I am developing a modpack and I notice some problem between optifine and cubic chunk!My games crash when the 2 mods are present while independently it works very well. Please give me an answer as soon as possible to overcome this problem.

What does the crash log say? Which version of Optifine are you using?

i am using the version OptiFine-1.12.2_HD_U_G5.jar .

here is the crash report : https://pastebin.com/YbShU3CG

Update cubic chunks to latest version.

Ah yes indeed thank you I downloaded the version available on t-luncher .... It must not be up to date