2 days ago, i couldn't enter my singleplayer world, i had the "Reading world data" loading indefinetly. Couldnt enter in a newly created world either. After deleting and reinstalling the modpack, the problem disapeared, and i played last night. Today, the problem came back, it just loads until I close the game and says it crashed. I found that many people solved this problem by removing the Biomes O Plenty mod.
So does it mean this singleplayer world is lost ? Is there a way to fix this without removing BoP, an update or something ? Otherwise I imagine my save will be corrupted.

I hope someone can help me at least understand,
Thanks in advance :)

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