Disassembling an assembled contraption containing an item silo multiblock (single silo is fine) causes a ticking block entity crash prevents rejoining the world (if the relevant chunks are loaded). The following setup is sufficient to trigger the crash if you toggle the lever twice.

Here's a stacktrace from a minimal modded install

https://mclo.gs/koFyvmu

Notably this does not affect Fluid Vessels

This is caused by contraption changes in Create 0.5.1g. You can enter the world by installing Neruina for now, which will disable the item silo to prevent further crashes.

This has been fixed in v0.9.1. It also attempts to fix corrupted worlds, but affected multi-block silos will be split into individual blocks.