From fd11e1301d89fd957e9d43b99d80002f1f3e02ff Mon Sep 17 00:00:00 2001
From: infinitail <53908966+infinitail@users.noreply.github.com>
Date: Sun, 5 Oct 2025 15:22:11 +0900
Subject: [PATCH] Fix issue-685

Resolve "Signature V4 requires AWS credentials for request signing" Exception at Moodle 5.0.
---
 classes/local/store/s3/client.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/classes/local/store/s3/client.php b/classes/local/store/s3/client.php
index d1d6a389..72bd8931 100644
--- a/classes/local/store/s3/client.php
+++ b/classes/local/store/s3/client.php
@@ -321,6 +321,9 @@ public function test_connection() {
             } else {
                 $this->client->headBucket(['Bucket' => $this->bucket]);
             }
+        } catch (\Aws\Auth\Exception\UnresolvedAuthSchemeException $e) {
+            $connection->success = false;
+            $connection->details = $this->get_exception_details($e);
         } catch (\Aws\S3\Exception\S3Exception $e) {
             $connection->success = false;
             $connection->details = $this->get_exception_details($e);