The proper link you are trying to reach should be:
For some reason you used a link with "/forums/ui/", which is wrong, instead of the correct one - "/forums/kendo-ui-web/".
Because the system didn't recognize the link, it showed you the root directory of the forums.
Can I ask where did you find this link, if it was on our site it is certainly a mistake on our part and we will fix it immediately.
Thank you for reporting the issue.