Invalid AWS credentials to access external S3 bucket in composition settings
WARNING: 53621
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WARNING
Warning - 53621
Invalid AWS credentials to access external S3 bucket in composition settings
The AWS credentials configured in your account's composition settings are not valid.
The media will not be uploaded until the configuration has been fixed.
Causes
If you have specified your own bucket and access credentials, this is most likely due to the fact that the AWS Access Key ID and Secret Access Key are not correct.
Solutions
In the composition settings section of your account's console, set some valid credentials for accessing your S3 bucket or disable the external storage (media will be uploaded to the default bucket).