Well, the Views in that page have no Query Filter added so calling any ?= parameter will never work.
Neither hidden link, nor hidden link have a Query Filter responding to any of the redirects or URL query parameters you add in the code.
I see you have Front End filters in those Views but without query filters they are useless.
Nothing will be filtered if there is no Query filter, but just a Search filter (front end)
There seems to be a problem with both views actually:
This View has some query filters that are missing from the form. Maybe you have removed them:
Filter by post search
Filter by tables-features
Filter by product_cat
Filter by wallbed-feature
Filter by luggage-cart-feature
Filter by food-warmer-feature
Filter by dance-floor-feature
Filter by market
Filter by buffet-station-features
Filter by stages-risers-features
Can they also be removed from the query filtering?
This View has some query filters that are missing from the form. Maybe you have removed them:
Filter by color
Filter by stages-risers
Filter by tables
Filter by ptype
Filter by functionality
Filter by shape
Filter by attached-seating
Filter by seating-capacity
Filter by ada
Filter by accessories-caddies-feature
Can they also be removed from the query filtering?
The problem its that there are NO query filters, so the message is wrong, there are no filters in those views.
At least this view does not even have the Search filters hidden link, but this view actually has the Search filters, however the QUERY filters are missing, hence nothing can be filtered:
hidden link
Additionally I see the Views are broken (no code highlighting) hence there are more conflicts interacting here.
1. The Views like this will not produce any filtered results.
2. The Code you use, even if working, won't filter or select anything as the filters are missing.
3. Finally, your snippet is inactive: hidden link > code.
I am not sure if you have the code in your theme instead?
Because I see the checkbox checked when using the Views version you suggest to check, pointing to some difference between current and older Views versions - but these views would not have worked either in any older version as the query filters are missing.
But then, I see you do a lot of redirects in your theme with wpv-items so it could be that you customized the queries with code...
In other words, we are not any step further than before.
I need a copy of this site and I need to know how to setup a redirect like you do that works, because a clean such redirect does not work.
I see a lot of the code in the theme uses API from the Toolset Plugins, so it could be that you fully build your query with some API for Views, but it is not done in the 2 Views included on that archive linked.
I need to understand how you achieve this problem, to replicate it, and the developers to fix it.
Otherwise we cannot help with this.
Locally, the function does not work if you use or not Toolset.
I replicated this several times, and Toolset will not fix the function if it is not working.
I assume I miss some crucial step.
Can you please send me a copy of this site, and explain where I find the code, and all involved items, so I can debug this locally?
Thank you for your collaboration.