Square did a change to their API that has broken this module. Customers are seeing HTTP 500 after clicking Confirm Order on Step 3. I'm getting the following error in my logs:

Code:
[04-Mar-2020 13:37:39 America/Chicago] PHP Fatal error:  Uncaught Error: Call to undefined method SquareConnect\Configuration::callApi() in \www\store\includes\classes\vendors\square\connect\lib\Api\OAuthApi.php:134
Stack trace:
#0 \www\store\includes\classes\vendors\square\connect\lib\Api\OAuthApi.php(78): SquareConnect\Api\OAuthApi->obtainTokenWithHttpInfo(Object(SquareConnect\Model\ObtainTokenRequest))
#1 \www\store\includes\modules\payment\square.php(692): SquareConnect\Api\OAuthApi->obtainToken(Object(SquareConnect\Model\ObtainTokenRequest))
#2 \www\store\includes\modules\payment\square.php(557): square->renewOAuthToken()
#3 \www\store\includes\modules\payment\square.php(492): square->token_refresh_check()
#4 \www\store\includes\modules\payment\square.php(356): square->getAccessToken()
#5 \www\store\includes\classes\payment.php(245): square->before_process()
#6 \www\store\includes\modules\checkout_process.php(84): payment->before_process()
#7 \www\store\includes\modules\pages\checkout_process\header_php.php(14): require('\\www\\sto...')
#8 \www\store\index.php(36): require('\\www\\sto...')
#9 {main}
  thrown in \www\store\includes\classes\vendors\square\connect\lib\Api\OAuthApi.php on line 134
The last successful order I had with this module was on the 26th of February.

Unfortunately, because of this problem, I'm not able to use the Admin site Payments Module configuration page to disable this module so I can enable another. Help!