I'm currently making my modpack for 1.12.2, using tlauncher.
And i would want to include betterPortals to it, but installing it causes an issue.
When i enable it, my tl skin disappears and i appear as Steve, or Alex.
BP version is 0.3.7.7 and Forgelin version is 1.8.4
Also tested without other mods and with/without Optifine enabled

with BP

without BP

Please help

Buy the game.