[WebService::Dropbox] [ERROR] https://content.dropboxapi.com/2/files/upload {"path":"/Uploads/$filename"} -> [400] Error in call to API function "files/upload": Must provide HTTP header "Authorization" or URL parameter "authorization". at WebService/Dropbox.pm line 184.

##</code><code>##

#!/usr/bin/perl

use lib '.';
use strict;
use warnings;
use WebService::Dropbox;
use IO::File;

my $filename = '/var/www/vhosts/path/httpdocs/path/file.txt';
my $access_token = ''; 
my $dropbox = WebService::Dropbox->new({
    key => $access_token,
    # oauth2 is true by default for recent versions
});

my $local_file = $filename;
my $remote_path = '/Uploads/$filename'; 

my $content = IO::File->new($local_file, '<') or die "Cannot open $local_file: $!";

my $result = $dropbox->upload($remote_path, $content);

if ($result) {
    print "Successfully uploaded $local_file to Dropbox as $remote_path\n";
} else {
    die "Upload failed: " . $dropbox->error;
}