TypeError: can't access property "_data", error.response is undefined

[fexell]

I'm getting the following error when trying to send from a contact form in Nuxt 3:
TypeError: can't access property "_data", error.response is undefined

nuxt.config.ts:

mail: {
    message: {
      to: '***********@***********.com',
    },
    smtp: {
      host: 'smtp.***********.com',
      port: 587,
      auth: {
        user: '***********@***********.com',
        pass: '123***********',
      },
    },
  }

Anyone else having this problem? Is there a way to fix it?

Thanks!