Add-ons that generate stuff won’t work(also game crash)

I know that 1.16.100(bedrock just came out and it is honestly, a needed update, but there is a major problem:I was exited about this update because it adds add-ons items back in the creative inventory so i added a add-on/Mod that generates more structures to a new world and created the world, then after 30 seconds, my game crashed. So i reopened my game then opened the world and when the world generated, i did see the add-on items in the inventory, but noticed that none of the structures generated and i was thinking that it was some malfunction code that occurred but it shouldn’t be that because the structures did generate before 1.16.100, so i created a new world with a different add on that generates new biomes and created the world, then my game crashed again and i again reopened the world. But then when the world was loaded i saw no biomes that are in the add-on. Even thought the biomes and structures won’t generate, the mobs do, kind of weird...  Can you guys please fix this error, it will really be appreciated by me and most of the people that do play Minecraft with add-ons.