PLZ - Need Help for debug, don't know what to do T_T

[MossieurBanane]

Hello everyone, I'm contacting you after several days of debugging. I'm looking to create a new Event with a custom map.
So, I want to integrate a new Location into Stardew Valley 1.6. I already have Content Patcher, SMAPI, and Spacecore installed. The new Event/Location is called Sad Firefly Festival.

I have my map created, with all the necessary layers/object, in Tiled: SadFireflyFestival.tmx
Content.Json / Manifest.Json files (.json, not .txt)
Correct folder structure:

[CP] SadFireflyFestival/
├── manifest.json
├── content.json
└── Assets/
├──custom.png
└── Maps/
└── SadFireflyFestival.tmx


I simply want to load it, to test it and manually warp with:
Debug warp SadFireflyFestival 10 10

Spoiler: manifest.json

{
"Name": "SadFireflyFestival Location",
"Author": "MossieurBanane",
"Version": "1.0.0",
"Description": "Adds a new location called SadFireflyFestival",
"UniqueID": "MossieurBanane.SFF",
"MinimumApiVersion": "4.0.0",
"UpdateKeys": [ ],
"ContentPackFor": {
"UniqueID": "Pathoschild.ContentPatcher",
"MinimumVersion": "2.0.0"
},
"Dependencies": [
{
"UniqueID": "spacechase0.SpaceCore",
"IsRequired": true
}
]
}

Spoiler: content.json

{
"Format": "2.0.0",
"Changes": [
{
"Action": "Load",
"Target": "Maps/SadFireflyFestival",
"FromFile": "Assets/Maps/SadFireflyFestival.tmx"
}
]
}

In SMAPI, when "patch summary" I see :

Spoiler

=====================
== Content patches ==
=====================
The following patches were loaded. For each patch:
- 'loaded' shows whether the patch is loaded and enabled (see details for the reason if not).
- 'conditions' shows whether the patch matches with the current conditions (see details for the reason if not). If this is unexpectedly false, check (a) the conditions above and (b) your Where field.
- 'applied' shows whether the target asset was loaded and patched. If you expected it to be loaded by this point but it's false, double-check (a) that the game has actually loaded the asset yet, and (b) your Targets field is correct.
Sad Firefly Festival:
---------------------
Local tokens:
token name | value
---------- | -----
ModId | [X] MossieurBanane.SadFireflyFestival
Patches:
loaded | conditions | applied | priority | name + details
------- | ---------- | ------- | --------- | --------------
[X] | [X] | [ ] | Exclusive | Load Maps/SadFireflyFestival
No current changes.

I tried so many ways T_T