ERR_EMPTY_RESPONSE when attachment is .docx

[srumberg]

Script URL: http://www.statementconverter.com/suppo ... t_post.php
Version of script: 2.8.2
Hosting company: GoDaddy
URL of phpinfo.php: (this seems unwise to share for security reason)
URL of session_test.php:
What terms did you try when SEARCHING for a solution: attachments, ERR_EMPTY_RESPONSE

Write your message below:

1. Submitting a ticket with attachments that are text files (.txt) works, but submitting an attachment with .docx type results in:

This page isn’t working
www.statementconverter.com didn’t send any data.
ERR_EMPTY_RESPONSE

2. After this error, none of the support pages on the website are browsable.

3. In Hesk Settings > Help Desk > Attachments > Allowed file types, the value is: .iif,.xla,.gif,.jpg,.png,.zip,.rar,.csv,.doc,.docx,.xls,.xlsx,.txt,.pdf

4. On the server, the attachments folder permissions are 777 and I do see a recently uploaded .docx file.

Any idea what's causing this?

[Klemen]

This is not an error caused by Hesk, but something else on the server (maybe a security software?). You will need to check with your host and verify in the server logs.

[srumberg]

Thank you, Klemen