laravel monitor check is getting failed

I am using spatie/laravel-server-monitor package . This package is Failed when run php artisan server-monitor:run-checks

Here is the error

update
  `checks`
set
  `last_run_output` = '{\"output\":\"\",\"error_output\":\"ssh: connect to host xdock.com.au port 22: Connection timed out\r\n\",\"exit_code\":255,\"exit_code_text\":\"Unknown error\"}',
  `checks`.`updated_at` = '2020-09-29 19:28:16'
where
  `id` = 5

host name is correct . but still giving this error

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