Enum Importation from files is broken

[weierstrass1]

I tried differents enum files but neither of them worked:

File1, a json:

{
    "TileMaskType": "Solid"
}

File2, a json with other format:

{
    "TileMaskType": [
        "Solid"
    ]
}

File 3 a txt:

Enum0: T1,T2

Any of this says "Unsupported External Enum", also they have a lot of issues when you try to import, for example some of them do 2 copies of the file, or doesn't return any enum value.

another file that i tried was this didn't work:

{
    "TileMaskType": [
        "Solid",
        "T16x16_XS_Slope_R_1",
        "T16x16_XS_Slope_R_2",
        "T16x16_XS_Slope_R_3",
        "T16x16_XS_Slope_R_4",
        "T16x16_XS_Slope_L_1",
        "T16x16_XS_Slope_L_2",
        "T16x16_XS_Slope_L_3",
        "T16x16_XS_Slope_L_4",
        "T16x16_XS_Slope_UDR_1",
        "T16x16_XS_Slope_UDR_2",
        "T16x16_XS_Slope_UDR_3",
        "T16x16_XS_Slope_UDR_4",
        "T16x16_XS_Slope_UDL_1",
        "T16x16_XS_Slope_UDL_2",
        "T16x16_XS_Slope_UDL_3",
        "T16x16_XS_Slope_UDL_4",
        "T16x16_S_Slope_R_1",
        "T16x16_S_Slope_R_2",
        "T16x16_S_Slope_R_3",
        "T16x16_S_Slope_L_1",
        "T16x16_S_Slope_L_2",
        "T16x16_S_Slope_L_3",
        "T16x16_S_Slope_UDR_1",
        "T16x16_S_Slope_UDR_2",
        "T16x16_S_Slope_UDR_3",
        "T16x16_S_Slope_UDL_1",
        "T16x16_S_Slope_UDL_2",
        "T16x16_S_Slope_UDL_3",
        "T16x16_M_Slope_R_1",
        "T16x16_M_Slope_R_2",
        "T16x16_M_Slope_L_1",
        "T16x16_M_Slope_L_2",
        "T16x16_M_Slope_UDR_1",
        "T16x16_M_Slope_UDR_2",
        "T16x16_M_Slope_UDL_1",
        "T16x16_M_Slope_UDL_2",
        "T16x16_L_Slope_R_1",
        "T16x16_L_Slope_L_1",
        "T16x16_L_Slope_UDR_1",
        "T16x16_L_Slope_UDL_1",
        "T16x16_XL_Slope_R_1",
        "T16x16_XL_Slope_R_2",
        "T16x16_XL_Slope_L_1",
        "T16x16_XL_Slope_L_2",
        "T16x16_XL_Slope_UDR_1",
        "T16x16_XL_Slope_UDR_2",
        "T16x16_XL_Slope_UDL_1",
        "T16x16_XL_Slope_UDL_2",
        "T16x16_XXL_Slope_R_1",
        "T16x16_XXL_Slope_R_2",
        "T16x16_XXL_Slope_R_3",
        "T16x16_XXL_Slope_L_1",
        "T16x16_XXL_Slope_L_2",
        "T16x16_XXL_Slope_L_3",
        "T16x16_XXL_Slope_UDR_1",
        "T16x16_XXL_Slope_UDR_2",
        "T16x16_XXL_Slope_UDR_3",
        "T16x16_XXL_Slope_UDL_1",
        "T16x16_XXL_Slope_UDL_2",
        "T16x16_XXL_Slope_UDL_3",
        "T16x16_XXXL_Slope_R_1",
        "T16x16_XXXL_Slope_R_2",
        "T16x16_XXXL_Slope_R_3",
        "T16x16_XXXL_Slope_R_4",
        "T16x16_XXXL_Slope_L_1",
        "T16x16_XXXL_Slope_L_2",
        "T16x16_XXXL_Slope_L_3",
        "T16x16_XXXL_Slope_L_4",
        "T16x16_XXXL_Slope_UDR_1",
        "T16x16_XXXL_Slope_UDR_2",
        "T16x16_XXXL_Slope_UDR_3",
        "T16x16_XXXL_Slope_UDR_4",
        "T16x16_XXXL_Slope_UDL_1",
        "T16x16_XXXL_Slope_UDL_2",
        "T16x16_XXXL_Slope_UDL_3",
        "T16x16_XXXL_Slope_UDL_4"
    ]
}