Cannot process content of type text/html" – despite correct XML response from PHP
Hello,
I have a PDF form created with AEM Forms (Designer) that submits data using a button configured as:
- Submit to URL: https://mydomain.com/submit_form.php
- Submit As: XML Data (XML)
- Encoding: UTF-8
Until recently, the form was working fine on all machines. Now, on all machines, I receive the following error:
> An error occurred during the submit process. Cannot process content of type text/html
However:
- The data **is successfully saved** to the MySQL database via PHP
- The response from the PHP server is properly formatted as XML
I narrowed the testing to this example `xml_response.php`, which i accesed via Submit button in Adobe form and directly from Chrome:
<?php
while (ob_get_level()) ob_end_clean();
header("Content-Type: text/xml; charset=UTF-8");
echo '<?xml version="1.0" encoding="UTF-8"?>';
echo '<response><status>success</status></response>';
exit;
When I run this file in Chrome or via curl, the response is:
HTTP/1.1 200 OK
Content-Type: text/xml; charset=UTF-8
<?xml version="1.0" encoding="UTF-8"?><response><status>success</status></response>
When i access it via Submit button from Adobe Reader i get the same error...
What I've tried:
Ensured no BOM in PHP file (checked with hex editor)
Removed all whitespace before <?php
Set default_charset = "" in php.ini
zlib.output_compression = Off
Cleared Adobe Reader temp/cache
No recent changes in Apache/PHP on server
Questions:
Why does Acrobat still throw this error despite receiving valid XML?
Could some system-level security tool (Windows Defender?) interfere with MIME detection?
Any help or similar experiences would be appreciated.
Thank you!
AdChoices