Guzzle conflict with WooCommerce Google Analytics Pro

Not sure why my initial post of this was deleted, but trying again. I’m getting a GuzzleHTTP lib conflict between the Constant Contact Forms and WooCommerce Google Analytics Pro plugins as follows:

Fatal error: Uncaught TypeError: Argument 3 passed to GuzzleHttp\Client::request() must be of the type array, string given, called in /path-to-content/wp-content/plugins/woocommerce-google-analytics-pro/vendor/guzzlehttp/guzzle/src/Client.php on line 89 and defined in /path-to-content/wp-content/plugins/woocommerce-google-analytics-pro/vendor/guzzlehttp/guzzle/src/Client.php:128 Stack trace: #0 /path-to-content/wp-content/plugins/woocommerce-google-analytics-pro/vendor/guzzlehttp/guzzle/src/Client.php(89): GuzzleHttp\Client->request('createRequest', 'GET', 'https://api.con...') #1 /path-to-content/wp-content/plugins/constant-contact-forms/vendor/constantcontact/constantcontact/constantcontact/src/Ctct/Services/BaseService.php(69): GuzzleHttp\Client->__call('createRequest', Array) #2 /path-to-content/wp-content/plugins/constant-contact-forms/vendor/constantcontact/constantcontact/constantcontact/src/Ctct/Services/AccountServ in /path-to-content/wp-content/plugins/woocommerce-google-analytics-pro/vendor/guzzlehttp/guzzle/src/Client.php on line 128

Deactivating one or the other plugin (obviously) clears the issue up, but isn’t really an option at this time. Please let me know if there is any further information I can supply.