<p>Possible explanation: The Authorization header was stripped away by Apache server. Try adding the following lines in .htaccess:</p>
<pre><code class="lang-plaintext">RewriteEngine On
RewriteCond %{HTTP:Authorization} ^(.*)
RewriteRule .* - [e=HTTP_AUTHORIZATION:%1]
</code></pre>


Possible explanation: The Authorization header was stripped away by Apache server. Try adding the following lines in .htaccess:

```plaintext
RewriteEngine On
RewriteCond %{HTTP:Authorization} ^(.*)
RewriteRule .* - [e=HTTP_AUTHORIZATION:%1]
```

PHP: 'Authorization' header sent with request, but missing from apache_request_headers()