Taxes not being collected

[cassandra8]

We use the taxjar module and have been getting the following php error using php 7.1

PHP Fatal error: Access level to AddressController::$should_redirect must be protected (as in class AddressControllerCore) or weaker in /home/xxxxxxxx/public_html/override/controllers/front/AddressController.php on line 0

It all started about the time we updated to 1.7.6 and /or we required our payment gateway to verify address. I am just not sure how to fix the problem. There is no line 0 to fix. Do I change this line of code from " private $should_redirect = false"         to protected?

In the meantime no taxes are being collected from the module.

I have tried contacting the module creator but have not heard back from them.