VMware NSX-T
The is due to the language set in the browser. NSX has been localized into multiple languages: English, German, French, Japanese, Simplified Chinese, Korean, Traditional Chinese, Italian, and Spanish.
Because NSX localization utilizes the browser language settings, if the language differs from the above the UI will fail to load.
This issue has been resolved in VMware NSX 4.1.1 available at Broadcom downloads.
Workaround:
To workaround the issue change the language of the browser to one of the supported languages below:
English, German, French, Japanese, Simplified Chinese, Korean, Traditional Chinese, Italian, and Spanish