From e87184d2bde3a265f63c23554e925dcbf8d62e5f Mon Sep 17 00:00:00 2001
From: Luke Towers <luke@luketowers.ca>
Date: Fri, 31 May 2019 01:03:07 -0600
Subject: [PATCH] Fix for installs that don't use the cloud drivers

---
 modules/backend/controllers/Files.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/modules/backend/controllers/Files.php b/modules/backend/controllers/Files.php
index 525d8f5f8..2ac62a722 100644
--- a/modules/backend/controllers/Files.php
+++ b/modules/backend/controllers/Files.php
@@ -66,12 +66,12 @@ class Files extends Controller
         $url = null;
         $disk = $file->getDisk();
         $adapter = $disk->getAdapter();
-        if ($adapter instanceof \League\Flysystem\Cached\CachedAdapter) {
+        if (class_exists('\League\Flysystem\Cached\CachedAdapter') && $adapter instanceof \League\Flysystem\Cached\CachedAdapter) {
             $adapter = $adapter->getAdapter();
         }
 
-        if (($adapter instanceof \League\Flysystem\AwsS3v3\AwsS3Adapter) ||
-            ($adapter instanceof \League\Flysystem\Rackspace\RackspaceAdapter) ||
+        if ((class_exists('\League\Flysystem\AwsS3v3\AwsS3Adapter') && $adapter instanceof \League\Flysystem\AwsS3v3\AwsS3Adapter) ||
+            (class_exists('\League\Flysystem\Rackspace\RackspaceAdapter') && $adapter instanceof \League\Flysystem\Rackspace\RackspaceAdapter) ||
             method_exists($adapter, 'getTemporaryUrl')
         ) {
             if (empty($path)) {