> Source: [sk126433](https://support.checkpoint.com/results/sk/sk126433)

# sk126433 - "Unable to connect to the server. Press OK to reconnect" error when clicking on "Network Interfaces" 

| Property | Value |
|----------|-------|
| Solution ID | sk126433 |
| Date Created | 2018-05-08 |
| Last Modified | 2021-08-08 |
| Technical Level | Advanced |
| Products | Security Gateway, Security Management Server, Multi-Domain Security Management Server |
| Versions | R81.10 (EOS), R81 (EOS), R81.10 (EOS), R81 (EOS), R81 (EOS), R81.10 (EOS) |
| OS | Gaia |

## Symptoms

- * When uBlock Origin or another ad-blocking tool is enabled by the Web Browser, the WebUI is logged out and the user sees the following error when clicking on "Network Interfaces": "`Unable to connect to the server. Press OK to reconnect.`" (**Note**: Other tabs in the WebUI are accessible with no issues.)
* Chrome Developer Tools (pressing F12) shows the "`ERR_BLOCKED_BY_CLIENT`" error.

## Cause

Ad Blocker like [uBlock Origin](https://ublockorigin.com/ "uBlock Origin") is blocking access to the "Network Interfaces" tab.  

Common filter lists like [EasyPrivacy](https://easylist.to/ "EasyPrivacy") is blocking requests to URLs containing the phrase "_stats.js?".

## Solution

This solution requires authentication. Please log in to view the full solution.

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