"Load last game state" on GBA not working

[maxlerebourg]

Awesome work on this project!
Just finish the install process, I upload a GBA Game, try to save state, it's working, but can't load it.
It is visible in the game state list.

[maxlerebourg]

Just saw why. The screenshot is uploaded but not the game state.

/assets/play-states.js

  async function saveState(auto) {
        if (!EJS_emulator || !EJS_emulator.gameManager) {
            return;
        }
        const state = await EJS_emulator.gameManager.getState();
        const screenshot = await EJS_emulator.gameManager.screenshot();
        const response = await uploadState(state, screenshot, auto);
        if (response) {
            window.LatestStateUrl = response.StateFileDownloadLink
        }
    } 

When the upload state is sent to the server, this is what the body looks like:

------geckoformboundary2394e17e91ccc809445dfbcbf4bac87
Content-Disposition: form-data; name="state"; filename="blob"
Content-Type: application/octet-stream


------geckoformboundary2394e17e91ccc809445dfbcbf4bac87
Content-Disposition: form-data; name="screenshot"; filename="blob"
Content-Type: application/octet-stream

�PNG
�
���
IHDR���ð��� ��

We can see that the state blob is empty