Forum Landing page is not working in 10.3

I have moved from 8.5 to 10.3 version.

Earlier url was :

But now url has change:

page is working fine, list of forum is not getting render. It is showing below error

No posts matching your filter criteria found. Please try another filter option.

$core_v2_ui.Pager($core_v2_ui.GetCurrentPageIndex(), 15, $threads.TotalRecords, "%{ShowPrevious='true', ShowNext='true', ShowFirst='true', ShowLast='true'}")

please help me on this