Form not working due to reaching upload quota?

One of my forms isn't working due to "reaching upload quota". There are no specifics about what this means. I only have 18 submissions and very few views so why would this be. there are no upload files on the form. It is "client registration form"

Have you already resolved the issue?

I can see the forms are active and the account is in good standing.

Do let us know if you have any further questions.

Thanks.