Conflicts with WP File Download Addon 4.5.27 and up

Just wanted to let you know there is a critical error/conflict between Simply Schedule Appointments and WP File Download Addon since WP File Download Addon version 4.5.27. The issue is a conflict between Guzzle versions.

I attempted to report the same issue to JoomUnited (makers of the other plugin) but they do not accept bug reports. Maybe there is a way to isolate these libraries to just the plugin’s internal functionality so they do not conflict with other plugins that use outdated library files? I can see that WP File Download Addon uses Guzzle 6.5.8 and Simply Schedule Appointments uses version 7.7.0

Stack trace below – happy to provide more info if it would be helpful.

Fatal error: Uncaught Error: Call to undefined method GuzzleHttp\Utils::chooseHandler() in /var/app/current/wp-content/plugins/simply-schedule-appointments/vendor/guzzlehttp/guzzle/src/functions.php:61 Stack trace: #0 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/lib/prod_vendor/guzzlehttp/guzzle/src/HandlerStack.php(42): GuzzleHttp\choose_handler() #1 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/lib/prod_vendor/guzzlehttp/guzzle/src/Client.php(65): GuzzleHttp\HandlerStack::create() #2 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/lib/prod_vendor/google/apiclient/src/Client.php(1190): GuzzleHttp\Client->__construct(Array) #3 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/lib/prod_vendor/google/apiclient/src/Client.php(1143): Google\Client->createDefaultHttpClient() #4 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/lib/prod_vendor/google/apiclient/src/Client.php(411): Google\Client->getHttpClient() #5 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/lib/prod_vendor/google/apiclient/src/Client.php(891): Google\Client->authorize() #6 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/lib/prod_vendor/google/apiclient/src/Service/Resource.php(238): Google\Client->execute(Object(GuzzleHttp\Psr7\Request), 'Google\\Service\\...') #7 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/lib/prod_vendor/google/apiclient-services/src/Drive/Resource/Files.php(174): Google\Service\Resource->call('generateIds', Array, 'Google\\Service\\...') #8 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/app/admin/classes/WpfdAddonGoogle.php(271): Google\Service\Drive\Resource\Files->generateIds(Array) #9 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/app/site/google.init.php(14): WpfdAddonGoogleDrive->checkAuth() #10 /var/app/current/wp-content/plugins/wp-file-download-cloud-addon/app/site/init.php(40): include_once('/var/app/curren...') #11 /var/app/current/wp-includes/class-wp-hook.php(308): wpfdAddonInit('') #12 /var/app/current/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #13 /var/app/current/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #14 /var/app/current/wp-settings.php(623): do_action('init') #15 /var/app/current/wp-config.php(44): require_once('/var/app/curren...') #16 /var/app/current/wp-load.php(50): require_once('/var/app/curren...') #17 /var/app/current/wp-blog-header.php(13): require_once('/var/app/curren...') #18 /var/app/current/index.php(17): require('/var/app/curren...') #19 {main} thrown in /var/app/current/wp-content/plugins/simply-schedule-appointments/vendor/guzzlehttp/guzzle/src/functions.php on line 61