diff --git a/apps/settings/lib/Controller/AppSettingsController.php b/apps/settings/lib/Controller/AppSettingsController.php
index e4a36c986fe23..554420862a646 100644
--- a/apps/settings/lib/Controller/AppSettingsController.php
+++ b/apps/settings/lib/Controller/AppSettingsController.php
@@ -254,9 +254,15 @@ private function fetchApps() {
 		$apps = $appClass->listAllApps();
 		foreach ($apps as $app) {
 			$app['installed'] = true;
-			// locally installed apps have a flatted screenshot property
+
 			if (isset($app['screenshot'][0])) {
-				$app['screenshot'] = $this->createProxyPreviewUrl($app['screenshot'][0]);
+				$appScreenshot = $app['screenshot'][0] ?? null;
+				if (is_array($appScreenshot)) {
+					// Screenshot with thumbnail
+					$appScreenshot = $appScreenshot['@value'];
+				}
+
+				$app['screenshot'] = $this->createProxyPreviewUrl($appScreenshot);
 			}
 			$this->allApps[$app['id']] = $app;
 		}
diff --git a/lib/private/App/InfoParser.php b/lib/private/App/InfoParser.php
index 54afd0069fb15..c22db132c4737 100644
--- a/lib/private/App/InfoParser.php
+++ b/lib/private/App/InfoParser.php
@@ -190,6 +190,17 @@ public function parse($file) {
 			$array['dependencies']['backend'] = [$array['dependencies']['backend']];
 		}
 
+		// Ensure some fields are always arrays
+		if (isset($array['screenshot']) && !is_array($array['screenshot'])) {
+			$array['screenshot'] = [$array['screenshot']];
+		}
+		if (isset($array['author']) && !is_array($array['author'])) {
+			$array['author'] = [$array['author']];
+		}
+		if (isset($array['category']) && !is_array($array['category'])) {
+			$array['category'] = [$array['category']];
+		}
+
 		if ($this->cache !== null) {
 			$this->cache->set($fileCacheKey, json_encode($array));
 		}
diff --git a/tests/data/app/expected-info.json b/tests/data/app/expected-info.json
index c3ea27af7d398..40ba6104104b3 100644
--- a/tests/data/app/expected-info.json
+++ b/tests/data/app/expected-info.json
@@ -6,7 +6,9 @@
 	"name": "Server-side Encryption",
 	"description": "\n\tThis application encrypts all files accessed by ownCloud at rest, wherever they are stored. As an example, with this application enabled, external cloud based Amazon S3 storage will be encrypted, protecting this data on storage outside of the control of the Admin. When this application is enabled for the first time, all files are encrypted as users log in and are prompted for their password. The recommended recovery key option enables recovery of files in case the key is lost. \n\tNote that this app encrypts all files that are touched by ownCloud, so external storage providers and applications such as SharePoint will see new files encrypted when they are accessed. Encryption is based on AES 128 or 256 bit keys. More information is available in the Encryption documentation \n\t",
 	"licence": "AGPL",
-	"author": "Sam Tuke, Bjoern Schiessle, Florin Peter",
+	"author": [
+		"Sam Tuke, Bjoern Schiessle, Florin Peter"
+	],
 	"requiremin": "4",
 	"shipped": "true",
 	"documentation": {
diff --git a/tests/data/app/various-single-item.json b/tests/data/app/various-single-item.json
new file mode 100644
index 0000000000000..ae5e751ab498c
--- /dev/null
+++ b/tests/data/app/various-single-item.json
@@ -0,0 +1,50 @@
+{
+	"id": "notifications",
+	"name": "Notifications",
+	"description": "A single screenshot should be an array",
+	"version": "1.0.0",
+	"licence": "agpl",
+	"author": [
+		"Joas Schilling"
+	],
+	"dependencies": {
+		"nextcloud": {
+			"@attributes": {
+				"min-version": "16",
+				"max-version": "16"
+			}
+		},
+		"backend": []
+	},
+	"screenshot": [
+		"https://raw.githubusercontent.com/nextcloud/notifications/refs/heads/master/docs/screenshot.png"
+	],
+	"category": [
+		"monitoring"
+	],
+	"info": [],
+	"background-jobs": [],
+	"activity": {
+		"filters": [],
+		"settings": [],
+		"providers": []
+	},
+	"commands": [],
+	"remote": [],
+	"public": [],
+	"repair-steps": {
+		"install": [],
+		"pre-migration": [],
+		"post-migration": [],
+		"live-migration": [],
+		"uninstall": []
+	},
+	"settings": {
+		"admin": [],
+		"admin-section": [],
+		"personal": [],
+		"personal-section": []
+	},
+	"two-factor-providers": [],
+	"types": []
+}
diff --git a/tests/data/app/various-single-item.json.license b/tests/data/app/various-single-item.json.license
new file mode 100644
index 0000000000000..84f7e70446ece
--- /dev/null
+++ b/tests/data/app/various-single-item.json.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/tests/data/app/various-single-item.xml b/tests/data/app/various-single-item.xml
new file mode 100644
index 0000000000000..cb9595516e151
--- /dev/null
+++ b/tests/data/app/various-single-item.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<!--
+ - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<info xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance"
+	  xsi:noNamespaceSchemaLocation="https://apps.nextcloud.com/schema/apps/info.xsd">
+	<id>notifications</id>
+	<name>Notifications</name>
+	<description>A single screenshot should be an array</description>
+	<version>1.0.0</version>
+	<licence>agpl</licence>
+	<author>Joas Schilling</author>
+
+	<category>monitoring</category>
+
+	<screenshot>https://raw.githubusercontent.com/nextcloud/notifications/refs/heads/master/docs/screenshot.png</screenshot>
+
+	<dependencies>
+		<nextcloud min-version="16" max-version="16"/>
+	</dependencies>
+</info>
diff --git a/tests/lib/App/InfoParserTest.php b/tests/lib/App/InfoParserTest.php
index 9affe3ff9ae39..ddd0df2543594 100644
--- a/tests/lib/App/InfoParserTest.php
+++ b/tests/lib/App/InfoParserTest.php
@@ -53,6 +53,7 @@ public function providesInfoXml(): array {
 			[null, 'invalid-info.xml'],
 			['navigation-one-item.json', 'navigation-one-item.xml'],
 			['navigation-two-items.json', 'navigation-two-items.xml'],
+			['various-single-item.json', 'various-single-item.xml'],
 		];
 	}
 }