[0.9.013-PUBLIC#2332] Load from File Error - Error: Cannot read properties of undefined (reading 'length')

[Wanko_Wizz]

Hello. Very new here so apologies if I'm missing some rules or something similar.
Get this error when attempting to load a save from a file only a few months old. File is a valid json so I'm unsure as to what could be the issue.
File attached. Thanks!