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Saving Activities and Avoiding 406 Errors

This article covers why a 406 Not Acceptable error may appear when saving activities, and how to fix it.

Last Update: June 17, 2026

Overview 

When editing or saving an activity in the Backoffice, you may sometimes encounter the error message:

“406 Not Acceptable”

This error usually appears when certain text or formatting in your activity fields is blocked by our security system. Don’t worry — this is not a system outage, but rather a safeguard to protect your account and data.

Why Does This Happen?

TrekkSoft uses a firewall to prevent unsafe code from being saved. Some text formats can look suspicious to the firewall, even if they are harmless. Common causes include:

  • Hidden formatting copied from Word, Google Docs, or other websites
  • Javascript links (e.g., href="javascript:...")
  • Curly brackets {} or unusual quotes in link code
  • Email links created with scripts instead of simple mailto: links

Example

Before (blocked):

html

<a href="javascript:webmail.View.mailto({mailto:'info%40example.com'})">info@example.com</a> 

After (accepted):

html

<a href="mailto:support@example.com">support@example.com</a> 

How to Fix It

  1. Copy your text into a plain text editor (Notepad or TextEdit).
  2. Remove hidden formatting, smart quotes, or embedded scripts.
  3. Replace any javascript: links with standard mailto: links.
  4. Paste the cleaned text back into TrekkSoft.
  5. Save the activity again.

Tips for Clean Formatting

  • Use TrekkSoft’s built‑in text editor for styling (bold, italics, lists).
  • Avoid copy‑pasting directly from Word or Docs — paste into a plain text editor first.
  • For email addresses, always use the format:html
    <a href="mailto:support@example.com">support@example.com</a> 

 

Note!

Important: Any text containing javascript: or suspicious HTML will be blocked. Always use plain text or safe HTML formatting to ensure your activities save correctly.

Still Seeing Errors?

In rare cases, your IP address may also be blocked by the firewall. If you continue to see 406 errors after cleaning your text, please contact support and provide your IP address so we can check and unblock it if necessary.