Customer can't save address when address validation is disabled in Magento 2.2

[rsisco]

In Magento 2.2.x, a customer is unable to save a new address in their address book if address validation is disabled in the AvaTax extension configuration.

Preconditions

Confirmed in Magento 2.2.x with AvaTax version 1.3.x

1. Magento 2.2.x
2. AvaTax extension is enabled, but address validation is set to "No" in backend configuration

Steps to reproduce

1. Login as customer on frontend
2. Navigate to My Account > Address Book and click "Add New Address"
3. Complete the required address elements and click "Save Address"

Expected result

1. The address is saved the account's address book

Actual result

1. The "Save Address" button is disabled, but the page never continues and no errors are displayed.
   

[rsisco]

This bug has been fixed in release 1.3.3. Closing issue.