Upload file Cannot mkdir in a snapshot. Try mountpoints instead.

[Denise-David]

Good morning,
I created an app with the upload of feathers.js, locally everything works perfectly but when I publish the whole upload it gives me this problem:
Cannot mkdir in a snapshot. Try mountpoints instead.

What does it mean?

[daffl]

If you are deploying a container it needs to have a writable folder it can access. You can find this information in the documentation of your deployment platform (e.g. here is an article for Docker).