Class 'PHPMailer' not found

Array
(
    [0] => Array
        (
            [file] => /home1/kamarono/public_html/theresourcescenter/libraries/src/MVC/Controller/BaseController.php
            [line] => 710
            [function] => cron
            [class] => JInboundController
            [type] => ->
        )

    [1] => Array
        (
            [file] => /home1/kamarono/public_html/theresourcescenter/components/com_jinbound/jinbound.php
            [line] => 28
            [function] => execute
            [class] => Joomla\CMS\MVC\Controller\BaseController
            [type] => ->
        )

    [2] => Array
        (
            [file] => /home1/kamarono/public_html/theresourcescenter/libraries/src/Component/ComponentHelper.php
            [line] => 382
            [args] => Array
                (
                    [0] => /home1/kamarono/public_html/theresourcescenter/components/com_jinbound/jinbound.php
                )

            [function] => require_once
        )

    [3] => Array
        (
            [file] => /home1/kamarono/public_html/theresourcescenter/libraries/src/Component/ComponentHelper.php
            [line] => 357
            [function] => executeComponent
            [class] => Joomla\CMS\Component\ComponentHelper
            [type] => ::
        )

    [4] => Array
        (
            [file] => /home1/kamarono/public_html/theresourcescenter/libraries/src/Application/SiteApplication.php
            [line] => 194
            [function] => renderComponent
            [class] => Joomla\CMS\Component\ComponentHelper
            [type] => ::
        )

    [5] => Array
        (
            [file] => /home1/kamarono/public_html/theresourcescenter/libraries/src/Application/SiteApplication.php
            [line] => 233
            [function] => dispatch
            [class] => Joomla\CMS\Application\SiteApplication
            [type] => ->
        )

    [6] => Array
        (
            [file] => /home1/kamarono/public_html/theresourcescenter/libraries/src/Application/CMSApplication.php
            [line] => 195
            [function] => doExecute
            [class] => Joomla\CMS\Application\SiteApplication
            [type] => ->
        )

    [7] => Array
        (
            [file] => /home1/kamarono/public_html/theresourcescenter/index.php
            [line] => 49
            [function] => execute
            [class] => Joomla\CMS\Application\CMSApplication
            [type] => ->
        )

)