HELP! i duplicated an agency template from the store & Im finding it difficult to edit

I downloaded this template Free Template - Webflow & if i try to remove the background colour biege / change the background colour biege to transparent, it doesnt change.

and because of this i cant edit the actual elements/blocks of each page.

PLEASE I LOVE THIS TEMPLATE & REALLY WANT TO USE IT
HELLLPPPPPPPP!!!