fixes #33408 - no need to add sharing scripts if the server is not yet installed

Author: DeepDiver1975

lib/private/legacy/template.php

@@ -104,10 +104,11 @@ public function __construct($app, $name, $renderAs = "", $registerCall = true, $
 	public static function initTemplateEngine($renderAs) {
 		if (self::$initTemplateEngineFirstRun) {
 
+			$isInstalled = \OC::$server->getSystemConfig()->getValue('installed', false);
 			//apps that started before the template initialization can load their own scripts/styles
 			//so to make sure this scripts/styles here are loaded first we use OC_Util::addScript() with $prepend=true
 			//meaning the last script/style in this list will be loaded first
-			if (\OC::$server->getSystemConfig()->getValue('installed', false) && $renderAs !== 'error' && !\OCP\Util::needUpgrade()) {
+			if ($isInstalled && $renderAs !== 'error' && !\OCP\Util::needUpgrade()) {
 				if (\OC::$server->getConfig()->getAppValue('core', 'backgroundjobs_mode', 'ajax') == 'ajax') {
 					OC_Util::addScript('backgroundjobs', null, true);
 				}
@@ -156,7 +157,7 @@ public static function initTemplateEngine($renderAs) {
 			OC_Util::addScript('files/fileinfo');
 			OC_Util::addScript('files/client');
 
-			if (\OCP\Share::isEnabled()) {
+			if ($isInstalled && \OCP\Share::isEnabled()) {
 				\OC_Util::addScript('core', 'shareconfigmodel');
 				\OC_Util::addScript('core', 'shareitemmodel');
 				\OC_Util::addScript('core', 'sharedialogresharerinfoview');