Error with .schem from Axiom

[hanako-eo]

Hello, I used the mod axiom for a build and I need to transform my .schem file into .schematic but my file generate an error (js track:)

Uncaught TypeError: value[key] is undefined
    nbt.Writer/this[nbt.tagTypes.compound]/< https://puregero.github.io/SchemToSchematic/nbt.js:358
    nbt.tagTypes.compound https://puregero.github.io/SchemToSchematic/nbt.js:357
    writeUncompressed https://puregero.github.io/SchemToSchematic/nbt.js:576
    schemtoschematic https://puregero.github.io/SchemToSchematic/schemtoschematic.js:1907
    parse https://puregero.github.io/SchemToSchematic/nbt.js:669
    onEnd https://puregero.github.io/SchemToSchematic/zlib.js:1254
    emitNone https://puregero.github.io/SchemToSchematic/zlib.js:3590
    emit https://puregero.github.io/SchemToSchematic/zlib.js:3670
    endReadableNT https://puregero.github.io/SchemToSchematic/zlib.js:11301
    afterTickTwo https://puregero.github.io/SchemToSchematic/zlib.js:9901
    run https://puregero.github.io/SchemToSchematic/zlib.js:10074
    drainQueue https://puregero.github.io/SchemToSchematic/zlib.js:10044