How big was your world size when you tried to open it?
For me the game freezes upon loading in for a few seconds then it crashes. (Windows 10)
For me, upon loading into one of my worlds the game would freeze for a few seconds then the game would just crash.
Even after the recent 1.16.201 hotfix there is still a significant amount of input lag. Unplayable in its current state, PLEASE PLEASE FIX!