Title: Cloudfront Credential Errors Last modified: February 21, 2022 --- # Cloudfront Credential Errors * Resolved [arpitkr](https://wordpress.org/support/users/arpitkr/) * (@arpitkr) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/) * I recently setup W3 total cache and things have been relatively smooth, and the plugin has been great * I have setup Cloudfront pull as CDN * Today, I updated a few of my plugins and proceeded to empty local and CDN cache. * As soon as I tried to empty CDN, I got a fatal error. I went and checked the logs, and this is what I saw * ``` PHP Fatal error: Uncaught Error: Call to undefined function GuzzleHttp\Promise\promise_for() in /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/Credentials/CredentialProvider.php:158 Stack trace: #0 /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/ClientResolver.php(443): Aws\Credentials\CredentialProvider::fromCredentials(Object(Aws\Credentials\Credentials)) #1 /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/ClientResolver.php(323): Aws\ClientResolver::_apply_credentials(Object(Aws\Credentials\Credentials), Array, Object(Aws\HandlerList)) #2 /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/AwsClient.php(199): Aws\ClientResolver->resolve(Array, Object(Aws\HandlerList)) #3 /var/www/html/wp-content/plugins/w3-total-cache/CdnEngine_Mirror_CloudFront.php(43): Aws\AwsClient->__construct(Array) #4 /var/www/html/wp-content/plugins/w3-total-cache/CdnEngine_Mirror_CloudFront.php(68): W3TC\CdnEngine_Mirror_CloudFront->_init() #5 /v in /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/Credentials/CredentialProvider.php on line 158 ``` * I logged into W3 dashboard to test Cloudfront credentials. The test fails with the following error * ``` [21-Feb-2022 07:05:20 UTC] PHP Fatal error: Uncaught Error: Call to undefined function GuzzleHttp\Promise\promise_for() in /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/Credentials/CredentialProvider.php:158 Stack trace: #0 /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/ClientResolver.php(443): Aws\Credentials\CredentialProvider::fromCredentials(Object(Aws\Credentials\Credentials)) #1 /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/ClientResolver.php(323): Aws\ClientResolver::_apply_credentials(Object(Aws\Credentials\Credentials), Array, Object(Aws\HandlerList)) #2 /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/AwsClient.php(199): Aws\ClientResolver->resolve(Array, Object(Aws\HandlerList)) #3 /var/www/html/wp-content/plugins/w3-total-cache/CdnEngine_Mirror_CloudFront.php(43): Aws\AwsClient->__construct(Array) #4 /var/www/html/wp-content/plugins/w3-total-cache/CdnEngine_Mirror_CloudFront.php(142): W3TC\CdnEngine_Mirror_CloudFront->_init() #5 / in /var/www/html/wp-content/plugins/w3-total-cache/vendor/aws/aws-sdk-php/src/Credentials/CredentialProvider.php on line 158 ``` * Now I can verify that the credentials are in fact correct. And no other plugin I have uses these credentials. Can you please let me know how to proceed with this? * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcloudfront-credential-errors%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 9 replies - 1 through 9 (of 9 total) * Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/) * (@vmarko) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15386498) * Hello [@arpitkr](https://wordpress.org/support/users/arpitkr/) * I am sorry about the issue you are experiencing and I am happy to assist you with this. Can you please confirm that you are not using any other plugin that may be using the same AWS SDK library? Thanks! * Thread Starter [arpitkr](https://wordpress.org/support/users/arpitkr/) * (@arpitkr) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15386611) * Thanks for the quick response Marko. * To the best of my knowledge, no. I haven’t explicitly used AWS credentials on any other plugin. * Having said that, I am not sure if there is any other plugin which is initialising the AWS SDK. Is there a way to find out? * EDIT: It seems Updraft does use the SDK. I am not sure if they initialise it or not because I haven’t setup AWS credentials with Updraft - This reply was modified 4 years, 3 months ago by [arpitkr](https://wordpress.org/support/users/arpitkr/). * Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/) * (@vmarko) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15387413) * Hello [@arpitkr](https://wordpress.org/support/users/arpitkr/) * Thank you for the information. Can you please temporarily disable Updraft and see if the problem persists? Thanks! * Thread Starter [arpitkr](https://wordpress.org/support/users/arpitkr/) * (@arpitkr) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15387758) * I just did, still getting the same error * Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/) * (@vmarko) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15387830) * Hello [@arpitkr](https://wordpress.org/support/users/arpitkr/) * Can you try to downgrade the W3TC version to 2.1.2. There could be a bug in the version of the Aws lib or a different class loaded by the autoloader due to another Aws lib loaded for another plugin as I’ve mentioned before. Thanks! * Thread Starter [arpitkr](https://wordpress.org/support/users/arpitkr/) * (@arpitkr) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15388015) * Thanks Marco There was actually an issue with Google listing, which I had upgraded today. Right now, the Google listing is crashing at multiple places. I have disabled it for now. Let me speak with Listing support and see what to do about it. * Thanks for looking at it. We can close it. If I face issues after getting around Listing plugin, I will get back to you * Thanks once again * Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/) * (@vmarko) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15388046) * Hello [@arpitkr](https://wordpress.org/support/users/arpitkr/) * Thank you for the information. Let me know what you found. Thanks! * Thread Starter [arpitkr](https://wordpress.org/support/users/arpitkr/) * (@arpitkr) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15389519) * Listing was crashing while initializing aws sdk which has something to do with Jetpack. What exactly, listing support would hopefully let me know * Interestingly enough, it seems that prevented even w3 total cache from initializing awe sdk * Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/) * (@vmarko) * [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15390713) * Hello [@arpitkr](https://wordpress.org/support/users/arpitkr/) * Thank you for sharing this as this may help users with similar issues. Viewing 9 replies - 1 through 9 (of 9 total) The topic ‘Cloudfront Credential Errors’ is closed to new replies. * ![](https://ps.w.org/w3-total-cache/assets/icon-256x256.png?rev=1041806) * [W3 Total Cache](https://wordpress.org/plugins/w3-total-cache/) * [Frequently Asked Questions](https://wordpress.org/plugins/w3-total-cache/#faq) * [Support Threads](https://wordpress.org/support/plugin/w3-total-cache/) * [Active Topics](https://wordpress.org/support/plugin/w3-total-cache/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/w3-total-cache/unresolved/) * [Reviews](https://wordpress.org/support/plugin/w3-total-cache/reviews/) * 9 replies * 2 participants * Last reply from: [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/) * Last activity: [4 years, 3 months ago](https://wordpress.org/support/topic/cloudfront-credential-errors/#post-15390713) * Status: resolved