Journal System not sending notification when submissions were completed

Describe the issue or problem
I have ojs installed on one of my addon domains but I discovered that every time a new submission was completed instead of sending notifications to all the editors and journal managers it only sends to the email address I use when installing the software.

What application are you using?
OJS 3.3.0.15

Additional information

[30-Aug-2023 09:24:18 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:24:18 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:24:18 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:24:18 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:25:03 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:25:03 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:25:03 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:25:03 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:25:41 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:25:41 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:25:41 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:25:41 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:26:07 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:26:07 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:26:07 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:26:07 UTC] ojs2: 404 Not Found
[30-Aug-2023 09:59:01 UTC] PHP Fatal error: Uncaught Error: Call to a member function getLocalizedTitle() on null in /home/maribacp/public_html/sljm.org/journal/lib/pkp/controllers/grid/notifications/NotificationsGridCellProvider.inc.php:157
Stack trace:
#0 /home/maribacp/public_html/sljm.org/journal/lib/pkp/controllers/grid/notifications/NotificationsGridCellProvider.inc.php(44): NotificationsGridCellProvider->_getTitle()
#1 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/controllers/grid/GridCellProvider.inc.php(56): NotificationsGridCellProvider->getCellActions()
#2 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/controllers/grid/GridHandler.inc.php(1104): GridCellProvider->render()
#3 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/controllers/grid/GridHandler.inc.php(1011): GridHandler->_renderCellInternally()
#4 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/controllers/grid/GridHandler.inc.php(988): GridHandler->renderRowInternally()
#5 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/controllers/grid/GridHandler.inc.php(1033): GridHandler->renderRowsInternally()
#6 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/controllers/grid/GridHandler.inc.php(923): GridHandler->renderGridBodyPartsInternally()
#7 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/controllers/grid/GridHandler.inc.php(643): GridHandler->doSpecificFetchGridActions()
#8 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/core/PKPRouter.inc.php(397): GridHandler->fetchGrid()
#9 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/core/PKPComponentRouter.inc.php(257): PKPRouter->_authorizeInitializeAndCallRequest()
#10 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/core/Dispatcher.inc.php(144): PKPComponentRouter->route()
#11 /home/maribacp/public_html/sljm.org/journal/lib/pkp/classes/core/PKPApplication.inc.php(362): Dispatcher->dispatch()
#12 /home/maribacp/public_html/sljm.org/journal/index.php(68): PKPApplication->execute()
#13 {main}
thrown in /home/maribacp/public_html/sljm.org/journal/lib/pkp/controllers/grid/notifications/NotificationsGridCellProvider.inc.php on line 157