Fatal error: Uncaught Error: Call to undefined method GuzzleHttp\Utils::chooseHandler() in /htdocs/wp-content/plugins/google-calendar-events/vendor/guzzlehttp/guzzle/src/functions.php:61 Stack trace: #0 /htdocs/wp-content/plugins/backwpup/vendor/guzzlehttp/guzzle/src/HandlerStack.php(42): GuzzleHttp\choose_handler() #1 /htdocs/wp-content/plugins/backwpup/vendor/guzzlehttp/guzzle/src/Client.php(65): GuzzleHttp\HandlerStack::create() #2 /htdocs/wp-content/plugins/google-calendar-events/vendor/google/apiclient/src/Google/Client.php(1169): GuzzleHttp\Client->__construct(Array) #3 /htdocs/wp-content/plugins/google-calendar-events/vendor/google/apiclient/src/Google/Client.php(1124): Google_Client->createDefaultHttpClient() #4 /htdocs/wp-content/plugins/google-calendar-events/vendor/google/apiclient/src/Google/Client.php(393): Google_Client->getHttpClient() #5 /htdocs/wp-content/plugins/google-calendar-events/vendor/google/apiclient/src/Google/Client.php(872): Google_Client->authorize() #6 /htdocs/wp-content/plugins/google-calen in /htdocs/wp-content/plugins/google-calendar-events/vendor/guzzlehttp/guzzle/src/functions.php on line 61