Warning: pg_connect(): Unable to connect to PostgreSQL server: FATAL: sorry, too many clients already in /var/www/html/lib/go_db.php on line 34

Fatal error: Uncaught TypeError: pg_query(): Argument #1 ($connection) must be of type resource, bool given in /var/www/html/lib/go_db.php:49 Stack trace: #0 /var/www/html/lib/go_db.php(49): pg_query() #1 /var/www/html/lib/go_url.php(18): Lib\go_db->query() #2 /var/www/html/index.php(42): Lib\go_url->get_original_url() #3 /var/www/html/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(43): {closure}() #4 /var/www/html/vendor/slim/slim/Slim/Routing/Route.php(384): Slim\Handlers\Strategies\RequestResponse->__invoke() #5 /var/www/html/vendor/slim/slim/Slim/MiddlewareDispatcher.php(81): Slim\Routing\Route->handle() #6 /var/www/html/vendor/slim/slim/Slim/MiddlewareDispatcher.php(81): Slim\MiddlewareDispatcher->handle() #7 /var/www/html/vendor/slim/slim/Slim/Routing/Route.php(341): Slim\MiddlewareDispatcher->handle() #8 /var/www/html/vendor/slim/slim/Slim/Routing/RouteRunner.php(84): Slim\Routing\Route->run() #9 /var/www/html/index.php(21): Slim\Routing\RouteRunner->handle() #10 /var/www/html/vendor/slim/slim/Slim/MiddlewareDispatcher.php(313): {closure}() #11 /var/www/html/vendor/slim/slim/Slim/MiddlewareDispatcher.php(81): Psr\Http\Server\RequestHandlerInterface@anonymous->handle() #12 /var/www/html/vendor/slim/slim/Slim/App.php(215): Slim\MiddlewareDispatcher->handle() #13 /var/www/html/vendor/slim/slim/Slim/App.php(199): Slim\App->handle() #14 /var/www/html/index.php(123): Slim\App->run() #15 {main} thrown in /var/www/html/lib/go_db.php on line 49