Conflict with WP Mail SMTP Pro Site Health Info

[jessecowens]

Describe the issue
When Central Connect and WP Mail SMTP Pro are both active, a 500 error on the Stats endpoint results in a false positive connection error on the Overview screen of Platform i.

Replication

1. Contact Jesse for a copy of WPMSMTPP that was provided by that plugin's support team
2. Install and activate WPMSMTPP and configure an SMTP provider
3. Note the connection error on the Overview screen, while the WP Admin connection and auth connections are fine

Relevant information

[09-Nov-2023 16:49:20 UTC] PHP Warning:  Undefined array key "wp_mail_smtp" in /home/wordpress/doc_root/wp-content/plugins/wp-mail-smtp-pro/src/Pro/SiteHealth.php on line 99
[09-Nov-2023 16:49:20 UTC] PHP Warning:  Trying to access array offset on value of type null in /home/wordpress/doc_root/wp-content/plugins/wp-mail-smtp-pro/src/Pro/SiteHealth.php on line 99
[09-Nov-2023 16:49:20 UTC] PHP Fatal error:  Uncaught TypeError: array_merge(): Argument #1 must be of type array, null given in /home/wordpress/doc_root/wp-content/plugins/wp-mail-smtp-pro/src/Pro/SiteHealth.php:99
Stack trace:
#0 /home/wordpress/doc_root/wp-content/plugins/wp-mail-smtp-pro/src/Pro/SiteHealth.php(99): array_merge(NULL, Array)
#1 /home/wordpress/doc_root/wp-includes/class-wp-hook.php(324): WPMailSMTP\Pro\SiteHealth->register_pro_debug_information(Array)
#2 /home/wordpress/doc_root/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array)
#3 /home/wordpress/doc_root/wp-admin/includes/class-wp-debug-data.php(1463): apply_filters('debug_informati...', Array)
#4 /home/wordpress/doc_root/wp-content/plugins/boldgrid-connect-feature-rest-api/src/Analytics/Stats.php(55): WP_Debug_Data::debug_data()
#5 /home/wordpress/doc_root/wp-content/plugins/boldgrid-connect-feature-rest-api/src/Analytics/Stats.php(33): BoldGrid\Connect\Analytics\Stats::getDebugInfo()
#6 /home/wordpress/doc_root/wp-content/plugins/boldgrid-connect-feature-rest-api/src/Analytics/Router.php(52): BoldGrid\Connect\Analytics\Stats->getData()
#7 /home/wordpress/doc_root/wp-includes/rest-api/class-wp-rest-server.php(1193): BoldGrid\Connect\Analytics\Router->BoldGrid\Connect\Analytics\{closure}(Object(WP_REST_Request))
#8 /home/wordpress/doc_root/wp-includes/rest-api/class-wp-rest-server.php(1041): WP_REST_Server->respond_to_request(Object(WP_REST_Request), '/bgc/v1/stats', Array, NULL)
#9 /home/wordpress/doc_root/wp-includes/rest-api/class-wp-rest-server.php(431): WP_REST_Server->dispatch(Object(WP_REST_Request))
#10 /home/wordpress/doc_root/wp-includes/rest-api.php(424): WP_REST_Server->serve_request('/bgc/v1/stats')
#11 /home/wordpress/doc_root/wp-includes/class-wp-hook.php(324): rest_api_loaded(Object(WP))
#12 /home/wordpress/doc_root/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#13 /home/wordpress/doc_root/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#14 /home/wordpress/doc_root/wp-includes/class-wp.php(418): do_action_ref_array('parse_request', Array)
#15 /home/wordpress/doc_root/wp-includes/class-wp.php(813): WP->parse_request('')
#16 /home/wordpress/doc_root/wp-includes/functions.php(1336): WP->main('')
#17 /home/wordpress/doc_root/wp-blog-header.php(16): wp()
#18 /home/wordpress/doc_root/index.php(17): require('/home/wordpress...')
#19 {main}
  thrown in /home/wordpress/doc_root/wp-content/plugins/wp-mail-smtp-pro/src/Pro/SiteHealth.php on line 99