Error During Synchronization

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While using Logos, you may see an exclamation mark within the sync arrows with the following message appearing when you hover over the sync icon:

    "An error occurred during synchronization."

This error occurs when Logos is unable to synchronize content like documents, notes, highlights, and reading plans with our servers. This is typically due to the lack of an internet connection or interference from a firewall or security application. Please use the steps below to troubleshoot the issue.

Tip: This article does not refer to software updates. If you're having trouble updating the software, please click here.


Solution 1: Check Your Internet Connection

If you are connecting through a Wireless Network, try moving closer to the router, or plugging directly in to the router to improve network performance.


Solution 2: Confirm Your Installation

Logos should automatically update to the latest version when you're connected to the internet. You can confirm you're using the latest version of Logos by re-running the installation software from


Solution 3: Repair Sync

Type sync repair in the Command box and select Sync Repair from the results.

Repair Sync


Solution 4: Firewall & Security

If you use firewall or security software, check your settings to ensure Logos is not being blocked. Configuring your firewall and security software can vary drastically between vendors, but you can find general instructions here.

If you use the Windows Firewall, we have more specific instructions here.

If you connect to the internet through a campus or office network, your connection may be blocked by a Proxy. For help bypassing your Proxy, please contact your Network Administrator.


Solution 5: Disable or Bypass Internet Filters

Internet filtering software like "CyberSitter" may interfere with Logos. Disabling it may resolve the issue. If this works, contact the software vendor for help adding an exception for Logos.


Solution 6: Reset Network Hardware (Windows Only)

If the previous solutions do not resolve the issue, your network card configuration might be preventing communication with our server. Please try the following steps to reset your network card settings.


Windows 10/11:

  1. Go to the Start menu.
  2. Type "Command Prompt".
    • You don't need to click anything, just start typing.
    • "Command Prompt" will be listed.
  3. Right-click "Command Prompt".
  4. Click "Run as administrator" at the bottom of the screen.
  5. At the prompt, type:
    netsh winsock reset
  6. Hit Enter.
  7. Restart the Computer.


Contact Support

If you're still having trouble, it may be necessary to collect diagnostic logs for further troubleshooting. Instructions for this are available here.

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