system entities warning while building video_discovery blueprint

[kran46]

Hi,
While building the blueprint for video_discovery I have come across the following error :
"warning: Unable to load query: Unable to resolve system entity of type 'sys_interval' for '80s'."
While asking questions using such intervals like "list tom hanks movies from the 80s" the sys_interval is not being resolved leading to wrong answers from the engine.
I have tried the solutions given in the documentation but nothing got resolved. Any help from your end in understanding and resolving the error is highly appreciated.