Edit ESXi 8 Firewall Displays "No items found" in vSphere Client After Upgrading vCenter to 9.1

Products

• VMware vCenter Server

Issue/Introduction

After upgrading VMware vCenter Server to version 9.x (9.1), attempting to edit ESXi 8 firewall rules in the vSphere Client UI results in the following behavior:

• The firewall rule list fails to load.

• The vSphere Client UI displays the message "No items found".

Environment

 

• vCenter Server: 9.x / 9.1

• ESXi: 8.0.x

• Client Interface: vSphere Client UI running in localized browser languages (e.g., Simplified Chinese / zh_CN)

 

Cause

Starting with vSphere 9.x, certain localized languages (including Chinese) are no longer supported by default in the vSphere Client UI. When accessing the client with an unsupported browser locale, UI data bindings fail, causing components like the firewall rule table to display empty results.

Resolution

To resolve this issue, switch the vSphere Client interface language to a supported language (such as English):

1. Change Browser Language Settings
2. Change your Web Browser’s primary language preference to English (United States).
3. Refresh or re-open the vSphere Client session.