Embedded Files
Where This Error Appears?
This error appears when the Zaperon Desktop App is unable to establish or maintain a secure connection to Zaperon services.
Users typically see one of the following states in the client app:
1. Services Not Running.
2. Internet Connection Lost.
Why This Happens?
This error usually occurs due to one or more of the following reasons:
No active internet connection on the device.
Network firewall or proxy blocking Zaperon required domains or ports.
Command-line access restricted (Windows devices).
Group Policy Object (GPO) disables Command Prompt.
Endpoint hardening policies restrict script or command execution.
Local security policy blocks CMD for standard users.
Third-party security tools restrict command-line usage.
Registry-based restrictions are applied to CMD access.
Zaperon client services stopped or failed to start.
Antivirus or endpoint security software blocking the client process.
Outdated Zaperon Client App version.
System reboot pending after installation or update.
✔ Key Steps For Resolving This Error
1. Check basic internet connectivity.
Ensure the device has an active internet connection.
Open any public website (for example, google.com).
Switch between Wi-Fi and wired network if available.
Disable VPNs or local proxies temporarily (if configured).
Once confirmed, click Retry Connection in the Zaperon Client App.
2. Reboot the device.
Restart the device. Will automatically Launch the Zaperon Client App at startup and after 1–2 minutes restart Zaperon client background services.
3. Restart Zaperon Client services.
Sometimes client services may stop unexpectedly.
1. In client app click on File in top ribbon.
2. Choose Exit option. this will restart the client app and all the background services.
4. Verify firewall, proxy, or network restrictions.
If the error persists, the network may be blocking required communication.
Ensure required ports and domains are allowed. Refer Prerequsities section & Network Related Troubleshooting for more info.
Corporate firewalls, hotel Wi-Fi, or public networks may block traffic
5. Check antivirus or endpoint security software.
Temporarily disable antivirus or EDR software.
Check antivirus logs and alerts:
Open the antivirus or security console.
Look for blocked or quarantined Zaperon-related files or services.
Add Zaperon to antivirus allowlist:
Add Zaperon Client to the allowlist/exclusions. Refer Prerequsities section for more info.
After policy changes, restart the device.
Relaunch the Zaperon Desktop Client and verify connectivity.
(If disabling antivirus resolves the error, configure a permanent exception.)
Restore blocked files:
Restore any quarantined Zaperon files.
Confirm the files are returned to their original location.
After policy changes, restart the device.
Relaunch the Zaperon Desktop Client and verify connectivity.
6. Check system restrictions (Windows).
Verify CMD access on the device:
Open Command Prompt as the logged-in user.
If CMD does not open or shows access denied, the restriction is confirmed. Contact your sytem admin for administrator permission access.
Validate local security and registry settings:
Check registry key: HKCU\Software\Policies\Microsoft\Windows\System
Ensure DisableCMD is not set to 1.
After policy changes, restart the device.
Relaunch the Zaperon Desktop Client and verify connectivity.
Check Group Policy settings:
Open Run windows by pressing win+R on your keyboard and type gpedit.msc.
Navigate to: User Configuration → Administrative Templates → System
Verify Prevent access to the command prompt is set to Not Configured or Disabled.
After policy changes, restart the device.
Relaunch the Zaperon Desktop Client and verify connectivity.
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