Cisco WS-C2960+24TC-L "Cisco {{platform}} {{deviceDescription}} {{version}}" in the Web GUI

[Doclassif]

How fix. 

Version 15.2 (7) E3

In IE GUI worked.

[Doclassif · Accepted solution]

In the file \ utils \ header \ headerCtrl.js folder html (web gui) commented out the line of code "xmlHttp.send (null);"

I dropped it on catalyst, cleared the browser cache and refreshed the page with ctrl + f5.

I throw off all the firmware with the fix. Everything seems to work in her.

[Doclassif]

This issue is most likely due to CORS browser policies.