Hi, so after a few months I logged into a world where I'm building something, and part of it is literally missing, not like an invisible texture, COMPLETELY missing, I don't know what happened. Here are some screenshots of the world and my mods. Please help me I've been working hard on this.

• MC Version: 1.12.2
• C&B Version: 14.33
• Do You have Optifine: yes