Plugin crashing since WordPress upgrade

Since upgrading to WordPress v 6.55, and PHP v8.2 thw erooms plugin has stopped working. On trying to sync meetings, there is a fatal exception error shown below. The script line looks as if it is working with version ids…I’ve not dug any deeper to establich exactly what the issue is,

I’ve checked all Zoom api values are okay, etc
Basically, have I shot myself in the foot by migrating to a WP version that may not be supported??

Error text:

An error of type E_ERROR was caused in line 116 of the file /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-app/vendor/guzzlehttp/guzzle/src/Utils.php. Error message: Uncaught Error: Undefined constant GuzzleHttp\ClientInterface::MAJOR_VERSION in /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-app/vendor/guzzlehttp/guzzle/src/Utils.php:116
Stack trace: 0 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-app/vendor/guzzlehttp/guzzle/src/functions.php(71): GuzzleHttp\Utils::defaultUserAgent() 1 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/wp-migration-duplicator/admin/vendor/guzzlehttp/guzzle/src/Client.php(278): GuzzleHttp\default_user_agent() 2 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/wp-migration-duplicator/admin/vendor/guzzlehttp/guzzle/src/Client.php(76): GuzzleHttp\Client->configureDefaults() 3 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-app/Interfaces/Request.php(36): GuzzleHttp\Client->__construct() 4 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-app/Endpoint/Users.php(24): Zoom\Interfaces\Request->__construct() 5 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-conference/StmZoom.php(519): Zoom\Endpoint\Users->__construct() 6 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-conference/StmZoom.php(533): StmZoom::stm_zoom_get_users_list() 7 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-conference/StmZoom.php(563): StmZoom::stm_zoom_get_users() 8 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/zoom-conference/StmZoomPostTypes.php(235): StmZoom::get_users_options() 9 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-includes/class-wp-hook.php(324): StmZoomPostTypes->{closure}() 10 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-includes/plugin.php(205): WP_Hook->apply_filters() 11 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/nuxy/metaboxes/metabox.php(60): apply_filters() 12 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-content/plugins/eroom-zoom-meetings-webinar/nuxy/metaboxes/metabox.php(216): STM_Metaboxes->fields() 13 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-includes/class-wp-hook.php(326): STM_Metaboxes->wpcfto_register_meta_boxes() 14 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() 15 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-includes/plugin.php(517): WP_Hook->do_action() 16 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-admin/includes/meta-boxes.php(1714): do_action() 17 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-admin/edit-form-advanced.php(271): register_and_do_post_meta_boxes() 18 /homepages/10/d890525319/htdocs/clickandbuilds/TramwayMuseumSociety/wp-admin/post-new.php(75): require(‘/homepages/10/d…’) 19 {main}

thrown