When trying to load this world after the latest updates I get an error message that is unable to load the world. I've tried reinstalling a back up from the cloud and it still doesn't load. 

In looking at other tickets that are currently open,  it's a similar issue reported in tickets MCPE-155093, 154121.

I had previously had this issue when the Cliffs and Caves update came out. That ticket for reference was MCPE-149193

I've had this world have a few years invested in this world. :/ HALP.