I got a world to save after a few more trys and it just worked huh. but the error log has quite a few entries.
Impoverished Word Selector
*** Error(s) found in the file "data/save/region1/raw/objects/language_EQUINE.txt"
EQUINEUnrecognized Translation Token: T_word
*** Error(s) found in the file "data/save/region1/raw/objects/b_detail_plan_default.txt"
STANDARD_HEAD_POSITIONS: BP_RELATION needs 6 tokens: BY_TOKEN:R_EYELID:AROUND:R_EYE:50:
STANDARD_HEAD_POSITIONS: BP_RELATION needs 6 tokens: BY_TOKEN:L_EYELID:AROUND:L_EYE:50:
*** Error(s) found in the file "data/save/region1/raw/objects/creature_alicorn.txt"
ALICORN Color Mod Ending With (YELLOW_GREEN,1) Was Not Used
ALICORN Color Mod Ending With (LYCOLBG,5) Was Not Used
ALICORN Color Mod Ending With (IRIS_EYE_TURQUOISE,1) Was Not Used
*** Error(s) found in the file "data/save/region1/raw/objects/creature_pony.txt"
Unrecognized Unit Type Token: KICKER
*** Error(s) found in the file "data/save/region1/raw/objects/creature_pony_griffon.txt"
PONY_GRIFFON:griffon_M:Attack SCRATCH seems to have correct format but could not find proper BPs in any caste, so not added
PONY_GRIFFON:griffon_F:Attack SCRATCH seems to have correct format but could not find proper BPs in any caste, so not added
PONY_GRIFFON Color Mod Ending With (ECRU,1) Was Not Used
*** Error(s) found in the file "data/save/region1/raw/objects/interaction_alicorn.txt"
ALICORN_CURSE:Unrecognized Interaction Token: GENERATED
ALICORN_CURSE:Unrecognized Interaction Token: IS_USAGE_HINT
ALICORN_CURSE:Unrecognized Interaction Token: TT_AFFECTED_CREATURE
*** Error(s) finalizing the translation EQUINE
Unrecognized word token: ANUS
Unrecognized word token: BITCH
*** Error(s) finalizing the creature ALICORN
ALICORN:FEMALE_ROYAL:upper body: No tissue thickness
ALICORN:FEMALE_ROYAL:lower body: No tissue thickness
*** Error(s) finalizing the interaction ALICORN_CURSE
Unrecognized Caste Token in Body Transformation Effect: ALICORN:DEFAULT
FORGOTTEN_BEAST_3:Unrecognized Creature Caste Body Token: RCP_3_EYELIDS