Error: Class "Aws\Handler\GuzzleV6\GuzzleHandler" not found in /vendor/craftcms/aws-s3/src/Fs.php:456

[ATaylorTNM]

Description

When trying to access an entry or global variables results in the following error.

Error: Class "Aws\Handler\GuzzleV6\GuzzleHandler" not found in /vendor/craftcms/aws-s3/src/Fs.php:456

On March 14th 2025 aws-sdk-php removed support for version 6 of Guzzle.

https://github.com/aws/aws-sdk-php/commit/d71a48b295924cc5b737bd6c415ebfb669919c19

Additional info

• Craft version: 5.6.13
• PHP version: 8.2.8
• Database driver & version: PostgreSQL 15.5
• Amazon S3 Plugin Version: 2.2.1

[kbergha]

Got hit by this today as well while updating for the RCE in Craft/Yii.
Relevant changelog entry: https://github.com/aws/aws-sdk-php/blob/master/CHANGELOG.md#33426---2025-03-14

Temporary workaround: Lock AWS SDK in composer.json to the version before GuzzleV6 was removed:

"craftcms/aws-s3": "2.2.1",
"aws/aws-sdk-php": "3.342.5"

[peteeveleigh]

I have also encountered this issue. Locking aws-sdk-php to 3.342.5 appears to have fixed the issue.

[Romanavr]

Bump, encountered the same after the upgrade.
@peteeveleigh fix helped me.