Looks like sanity checks in the new version got a bit more strict.
Unless the OXCE devs are planning to downgrade that specific error to a warning you have to adapt the ruleset files yourself to fix it [A].
Steps needed to be taken:
1) Navigate to the folder called "Ruleset" in the mod.
2) Open the file named "armors_Area_51.rul" and for each error lookup the corresponding section (named armor from the error).
Take note of the property "corpseBattle". See snippet below how that will look like.
- type: FEMALE_CIVILIAN10_ARMOR
spriteInv: INV_FEMALE_CIVILIAN
spriteSheet: FEMALE_CIVILIAN10.PCK
spriteFaceGroup: 6
spriteFaceColor: [96, 96, 96, 96, 160, 160, 163, 163]
corpseBattle:
- STR_FEMALE_CIVILIAN10_CORPSE
frontArmor: 2
...
3) Open the file named "items_Area_51.rul" and search for the item with the corresponding name from the previous "corpseBattle".
Those items have a missing " battleType: 11" entry, you have to paste that in.
Example
From:
- type: STR_FEMALE_CIVILIAN10_CORPSE
name: STR_CORPSE
weight: 25
bigSprite: 436
floorSprite: 489
invWidth: 2
invHeight: 3
armor: 12
recover: false
To:
- type: STR_FEMALE_CIVILIAN10_CORPSE
name: STR_CORPSE
weight: 25
bigSprite: 436
floorSprite: 489
invWidth: 2
invHeight: 3
armor: 12
recover: false
battleType: 11
Hope this helps.
[A] Area 51 is officially not available for download anymore. It is unlikely the author can/will fix this for you.