[Modded] Error when entering game.

That's a weird one, and not one i've seen yet. Id advise removing all mods and trying again. Something went wrong on profile creation

Your gonna have to play with your mods and figure it out. your logs don't provide enough information to know why its happening

The issue might be with a mod made by Props based on this part of the error you are getting: "Path 'Grids[0]._props.cellsV'". Firstly, make sure that any and all mods you are using are compatible with 3.7.1. If so, then try adding them one at a time, test for the error, and remove the mod then add the next one to narrow it down to the mod causing the error.