Refine your search doesn’t work although plugin is activated

Hi guys,
I’m newbie with tutor.
I’m trying to enable the “refine your search” module in LMS.
I followed the documentations and I created a plugin by copying this and it shows in the lms.env.json after i run tutor config save.

But still the Refine your Search stay blank.
I tried to check on the source code a little bit and found that its still blank in the core html.

Someone can help me out?