There is no background in the achievements menu.

We do not have enough information to find the cause of this issue.

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|https://minecrafthopper.net/help/guides/finding-minecraft-data-folder/]) here.

_{This issue has been temporarily closed as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.}

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki

[Mod] violine1101, i attached what you requested. Maybe this problem occurred because I allocated Java too little or too much RAM?

I only have 6 GB of RAM.

This issue is invalid, you game is modified. Recreate your issue if you can reproduce it in vanilla Minecraft.