While I try to use littleframe, to add 2nd one near the first, even if it's blank, my game just stop rendering, I can see just a sky, then it crashes. Game version 1.12.2. Modpack: https://imgur.com/a/sFBD5X4

I need the crash-report. You can find it in the minecraft folder. There is a subdirectory called crash-reports.

I will close this issue for now. I need more information. You can still respond here and I will reopen the issue once you reply.