Cannot Remove Pages and Tags from Sidebar

Hi

I am having a real frustrating time in trying to get rid of the default widget in the sidebar – Search, Latest Posts and Pages. It is the very first time in 10 years of wordpress templates I come across something as annoying as this. Please do not misunderstand me – YOU have a truly amazing template here and absolutely amazing to work with, Congrats, but this one spoils your amazing work ??

I have tried the other posts you have answered in adding widgets in the Tabbed Sidebar. I have added the same or additional widgets in all of the sidebars to counter this. I have gone so far as adding an additional plugin to install a sidebar in the admin panel so I could add a custom sidebar specifically for that page – But still NO go.

When I try to get rid of the sidebar and simply select ‘Full page’ for this particular page – it simply will NOT make the page full page and instead ad these hidden widgets to the sidebar.

Is there someway of getting rid of these widgets for ever and ever… Why they are there is perplexing. Or at least better control over the sidebars or what appears in them, or simply to turn these widgets off.
If possible please let us know where to remove these hidden widgets.

You can see it here:
https://www.stresscommunity.com/sign-up/

I desperately need this to work as it is a membership site and its truly useless to have on the Registration page a widget with links directly into the site – when users are supposed to register first.

Please do help. My thanks