Vintagium is a backport of Sodium's 1.12.2 Forge by CaffeinMC. Vintagium UnOfficial was created to prevent their repository .jar files from expiring. Please contact me with removal requests. (I am Japanese and use a translation tool. So please understand that there may be some word errors.)
Vintagium is not and never will be compatible with Optifine! Please do not write to Isuse in their repository with errors that occur in environments using Vintagium UnOfficial builds! Vintaguim UnOfficial cannot support Issuse!