405 Method Not Allowed

5:08:22 AM      Failed to upload emoji "i_user": DiscordAPIError[0]: 405: Method Not Allowed
    at handleErrors (file:///C:/Users/the1a/Downloads/apps/dyLcore/node_modules/@discordjs/rest/dist/index.mjs:686:13)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async SequentialHandler.runRequest (file:///C:/Users/the1a/Downloads/apps/dyLcore/node_modules/@discordjs/rest/dist/index.mjs:1087:23)
    at async SequentialHandler.queueRequest (file:///C:/Users/the1a/Downloads/apps/dyLcore/node_modules/@discordjs/rest/dist/index.mjs:918:14)
    at async _REST.request (file:///C:/Users/the1a/Downloads/apps/dyLcore/node_modules/@discordjs/rest/dist/index.mjs:1231:22)
    at async uploadMissingEmojis (file:///C:/Users/the1a/Downloads/apps/dyLcore/src/handlers/emojiHandler.js:64:30)

export async function uploadMissingEmojis(client) {
    let emojiFiles = [];

    try {
        emojiFiles = fs
            .readdirSync(emojiDir)
            .filter(file => file.endsWith('.png'));

        if (emojiFiles.length > 0) {
            log(`Detected ${emojiFiles.length} emoji files to upload.`);
        }
    } catch (e) {
        error(`Failed to read emoji directory: ${e}`);
        return;
    }

    const rest = new REST({ version: '10' }).setToken(client.token);

    let appEmojis = [];

    try {
        appEmojis = await rest.get(Routes.applicationEmojis(client.application.id), {
            headers: { Authorization: `Bot ${client.token}` }
        });
    } catch (e) {
        warn(`Unable to fetch application emojis. Continuing without duplicate check: ${e}`);
    }

    if (!Array.isArray(appEmojis)) {
        appEmojis = Object.values(appEmojis);
    }

    for (const file of emojiFiles) {
        const emojiName = path.basename(file, path.extname(file));

        if (appEmojis.some(e => e.name === emojiName)) {
            debug(`Emoji "${emojiName}" already exists in the bot's application emojis.`);
            continue;
        }

        const emojiPath = path.join(emojiDir, file);
        let emojiBuffer;
        try {
            emojiBuffer = fs.readFileSync(emojiPath);
        } catch (e) {
            error(`Failed to read emoji file "${file}": ${e}`);
            continue;
        }
        const imageData = `data:image/png;base64,${emojiBuffer.toString('base64')}`;

        try {
            const newEmoji = await rest.post(
                Routes.applicationEmoji(client.application.id),
                {
                    body: { name: emojiName, image: imageData },
                }
            );
            success(`Uploaded emoji "${newEmoji.name}" to the bot's application.`);
        } catch (e) {
            error(`Failed to upload emoji "${emojiName}": ${e.stack}`);
        }
    }
}