Public API link doesn't work

[tien_phan_anotw]

Hi,

I tried many time to open the Public API link, but could not succeed. I used Chrome normal mode, and Private mode. Also clear all of cache. But still could not open that link. 

There is HTTP error log

type Status report
message /smartzone/5.1/vsze-public-api-reference-guide-5-1.html
description The requested resource is not available.

That's useful link for API reference. Does anyone meet the same issue? and how did you solve?

In fact, sometimes, I did meet the same issue HTTP code 404 with some Ruckus's link. 
I hope you have any solution. 
Thank you so much. 

Regards,
-T

[tien_phan_anotw]

Finally I can reach it with Private Mode in Chrome after clean all browser's history. Firefox didn't help to open that link.
Thank Anusha! 

[michael_brado]

I can view the vSZ-E in 5.1 and 5.1.1 versions... Chrome, first tries...