Spaces PHP SDK Changing ACL Error when Filepath or File contains symbols (like an @ (at))

I’m using the PHP AWS SDK, as suggested by a mod. (here)

I’m using the putObjectAcl function from the AWS PHP SDK. And when I input a Filepath or Filename, that contains symbols like @ (at) the function returns an Exception. I opened an Issue Ticket on the repo of the PHP AWS SDK addressing this issue, to make sure, that the SDK itself isn’t the problem. (The Issue Ticket)

And the answer from a contributor concludes that the problem has to be on Digitaloceans end. In more detail, that Digitalcoean isn’t encoding the URL again, thus the File cant be found.

Here are the technical informations:

root@debian:~/test2# php setPublic.php
PHP Fatal error:  Uncaught exception 'Aws\S3\Exception\S3Exception' with message 'Error executing "PutObjectAcl" on "https://SPACE_NAME.fra1.digitaloceanspaces.com/%40acex/mod.cpp?acl"; AWS HTTP error: Client error: `PUT https://SPACE_NAME.fra1.digitaloceanspaces.com/%40acex/mod.cpp?acl` resulted in a `403 Forbidden` response:
<?xml version="1.0" encoding="UTF-8"?><Error><Code>SignatureDoesNotMatch</Code><RequestId>tx000000000000009ee57cd-005d26 (truncated...)
 SignatureDoesNotMatch (client):  - <?xml version="1.0" encoding="UTF-8"?><Error><Code>SignatureDoesNotMatch</Code><RequestId>tx000000000000009ee57cd-005d2636b1-1c0f65-fra1a</RequestId><HostId>1c0f65-fra1a-fra1</HostId></Error>'

GuzzleHttp\Exception\ClientException: Client error: `PUT https://SPACE_NAME.fra1.digitaloceanspaces.com/%40acex/mod.cpp?acl` resulted in a `403 Forbidden` response:
<?xml version="1.0" encoding="UTF-8"?><Error><Code>SignatureDoesNotMatch</Code><RequestId>tx000000000000009ee57cd-005d26 (truncated...)
 in /root/test2/ven in /root/test2/vendor/aws/aws-sdk-php/src/WrappedHttpHandler.php on line 195

Steps to reproduce

<?php
require 'vendor/autoload.php';
use Aws\S3\S3Client;

$key = "PRIVATE_KEY";
$secret = "PRIVATE_SECRET";

$space = "SPACE_NAME";
$region = "REGION";
$host = "digitaloceanspaces.com";
$endpoint = "https://".$space.".".$region.".".$host;


$client = Aws\S3\S3Client::factory(array(
    'region' => $region,
    'version' => 'latest',
    'endpoint' => $endpoint,
    'credentials' => array(
              'key'    => $key,
              'secret' => $secret,
          ),
    'bucket_endpoint' => true,
    'signature_version' => 'v4-unsigned-body'
  ));

  $aclHeader = ["ACL" => "public-read"];
  $acl = array_merge(array("Bucket" => $space, "Key" => '@acex/mod.cpp'), $aclHeader);
  
  $client->putObjectAcl($acl);