undefined function Doofinder\GuzzleHttp\choose

Hello there,

We have recently upgraded to 1.5.0 but when trying to save products in the cms we get the following error:

2021-06-09T09:30:28+00:00 CRITICAL Uncaught Error: Call to undefined function Doofinder\GuzzleHttp\choose_handler() in /public_html/web/app/plugins/doofinder-for-woocommerce/lib/vendor/guzzlehttp/guzzle/src/HandlerStack.php:42
Stack trace:
#0 /public_html/web/app/plugins/doofinder-for-woocommerce/lib/vendor/guzzlehttp/guzzle/src/Client.php(65): Doofinder\GuzzleHttp\HandlerStack::create()
#1 /public_html/web/app/plugins/doofinder-for-woocommerce/lib/src/Management/ManagementClient.php(37): Doofinder\GuzzleHttp\Client->__construct()
#2 /public_html/web/app/plugins/doofinder-for-woocommerce/includes/api/class-doofinder-api.php(127): Doofinder\Management\ManagementClient->__construct('eu1-api.doofind...', 'eu1-42a12f57f48...')
#3 /public_html/web/app/plugins/doofinder-for-woocommerce/includes/api/class-api-factory.php(62): Doofinder\WC\Api\Doofinder_A in /public_html/web/app/plugins/doofinder-for-woocommerce/lib/vendor/guzzlehttp/guzzle/src/HandlerStack.php on line 42

Have rolled back to an older version of the plugin for now to avert this error until this bug gets fixed.

Kind Regards