Please make sure to only use compatible dependencies for public vendored libraries.
Error: Declaration of Aws\HashingStream::seek($offset, $whence = Aws\SEEK_SET) must be compatible with Psr\Http\Message\StreamInterface::seek(int $offset, int $whence = Psr\Http \Message\SEEK_SET): void at /var/www/nextcloud/3rdparty/aws/aws-sdk-php/src/HashingStream.php#50
This app will install 2.0 of the PSR\http-message which conflicts with Server core and will result in S3 storage to break.
See also this for reference: https://github.com/nextcloud/server/issues/39981#issuecomment-1690144709
Please make sure to only use compatible dependencies for public vendored libraries.
At least stable 28 is affected.