Biomes O Plenty Bug

[AimHeart]

Hello, 

A few weeks ago I downloaded Biomes O Plenty and built a house using both Vanilla and the added blocks. I went to log into the single player world and my house has disappeared. All the vanilla blocks are still there but I can now walk  through the walls which used to be there (which were made using Biomes O Plenty blocks). However, the rest of the world is completely fine. There is a jacaranda field not to far from the house and all those blocks are fine, including the Biomes O Plenty blocks. I'm still playing on forge. The only thing that changed is that I downloaded the new Minecraft Launcher and I am using that with Forge.

Anyone know how to fix it? I really liked the house I built and wanted to build it in a different world. For context it is a survival multiplayer world. 

[Luis_ST]

13 minutes ago, AimHeart said:

Anyone know how to fix it? I really liked the house I built and wanted to build it in a different world.

unfortunately you can't, if you have created a backup of your world you can try to load this world,
it can also be that minecraft has create automatically a backup of your world,
you need to look at the backup folder its in .minecraft/backups

you also could post the debug log (when you run the game and load the world), then we may be able to find the error