Minecraft realms (bedrock, Nintendo switch) is not letting me replace my realm world please help.

I have spent several days setting up a world for me and my friends to play on, I've already used my realm quite a bit, but when replacing/uploading the world it says 'Error, We couldn't pack your world file for upload. Maybe your hard drive is full?' I deleted many worlds and screenshots but it still doesn't work. I play on Nintendo switch. Please help Mojang, I've noticed many others have this problem so please help.