Argument 2 passed to Symfony\Component\Routing\RouteCollection::add() must be an instance of Symfony\Component\Routing\Route, boolean given

Ubuntu 18.04.6
Apache2, Postgresql 10, Drupal 8.9.6, PHP 7.2.34 (most of the modules require these versions)

I've tried trouble shooting this problem for multiple weeks. I'm attempting to migrate a drupal website to our local server but keep running into this error.

So far I've looked into the Php version issues posted here (switched to php 7.3/7.4 and tried 8.0)
https://www.drupal.org/project/drupal/issues/3152660
Tried the solutions here, Symfony Routing Error
and I've reinstalled modules using composer

Found out that the website works when I use a mysql database server but we cant use that since the scripts on the site are formatted for a postgresql database. When I try to use the postgresql server I get this error when I try to access the website.

The website encountered an unexpected error. Please try again later.
TypeError: Argument 2 passed to Symfony\Component\Routing\RouteCollection::add() must be an instance of Symfony\Component\Routing\Route, boolean given, called in /var/www/html/regotoolbox/web/core/lib/Drupal/Core/Routing/RouteProvider.php on line 382 in Symfony\Component\Routing\RouteCollection->add() (line 75 of vendor/symfony/routing/RouteCollection.php).
Symfony\Component\Routing\RouteCollection->add('system.404', ) (Line: 382)
Drupal\Core\Routing\RouteProvider->getRoutesByPath('/system/404') (Line: 182)
Drupal\Core\Routing\RouteProvider->getRouteCollectionForRequest(Object) (Line: 239)
Drupal\Core\Routing\Router->getInitialRouteCollection(Object) (Line: 123)
Drupal\Core\Routing\Router->matchRequest(Object) (Line: 116)
Drupal\Core\Routing\Router->match('/system/404') (Line: 157)
Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber->makeSubrequest(Object, '/system/404', 404) (Line: 122)
Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber->on404(Object) (Line: 109)
Drupal\Core\EventSubscriber\HttpExceptionSubscriberBase->onException(Object, 'kernel.exception', Object)
call_user_func(Array, Object, 'kernel.exception', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.exception', Object) (Line: 227)
Symfony\Component\HttpKernel\HttpKernel->handleException(Object, Object, 1) (Line: 79)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

The main difference from the other drupal issues linked above is the system.404 that the routing is trying to add in the first line of the error. It would make sense if it was having trouble connecting to the database but I've verified several times that the database is working and connectable. Can't find anything else referencing this type of error so I've turned to asking here.

Thanks for your help!