Discord.js trying to merge images throws an error

[AroTheBirb]

I'm trying to merge an image from a dir and a user's avatar the dir is right but i get error

(node:6028) UnhandledPromiseRejectionWarning: Error: Couldn't load image
    at img.onerror (C:\Users\aoshe\OneDrive\Desktop\amogus\node_modules\merge-images\dist\index.umd.js:39:46)
    at setSource (C:\Users\aoshe\OneDrive\Desktop\amogus\node_modules\canvas\lib\image.js:91:13)
    at Image.set (C:\Users\aoshe\OneDrive\Desktop\amogus\node_modules\canvas\lib\image.js:62:9)
    at C:\Users\aoshe\OneDrive\Desktop\amogus\node_modules\merge-images\dist\index.umd.js:41:12
    at new Promise (<anonymous>)
    at C:\Users\aoshe\OneDrive\Desktop\amogus\node_modules\merge-images\dist\index.umd.js:30:55
    at Array.map (<anonymous>)
    at C:\Users\aoshe\OneDrive\Desktop\amogus\node_modules\merge-images\dist\index.umd.js:30:24
    at new Promise (<anonymous>)
    at mergeImages (C:\Users\aoshe\OneDrive\Desktop\amogus\node_modules\merge-images\dist\index.umd.js:22:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:6028) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:6028) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

the code:

const mergeImages = require('merge-images')
const { Canvas, Image } = require('canvas');

module.exports = {
    name: 'avatar',
    description: 'avatar',
    async execute(message, args) {
        var url;

        mergeImages(['../../assets/colors/yellow.png', message.author.displayAvatarURL()], {
            Canvas: Canvas,
            Image: Image
          }).then(b64 => url = b64);
          

        message.reply(url);
    }
}