[Vuejs]-Vue.js – v-on:change is not listening

The stack trace shows the error occurs in uploadFile, called by uploadProofOfWork. The error is Cannot read property 'name' of undefined. The only reference to .name inside uploadFile is file.name, where file is a function argument. If you look in uploadProofOfWork, there are no arguments passed to uploadFile:

this.uploadFile().then(imageUrl => /* ... */)

It doesn’t look like your code defines file anywhere in the path of uploadProofOfWork. I see file in fileUploaded, but it seems those files are intended to be uploaded in uploadImages (and not uploadProofOfWork). Perhaps your code is missing a separate file input for “proof of work”.