So I got this error and ended up having to move my Saved folder to my desktop and redownloading the game then moving my Saved folder back to not lose my progress and that fixed it so far :) Hope this helps people.
"LowLevelFatalError [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\HAL\MallocBinned2.cpp] [Line: 1438]
FMallocBinned2 Attempt to realloc an unrecognized block 00000130619C0000 canary == 0x0 != 0xe3"