I installed woocommerce and it or weaver added the following text on the shop page.
If you see this message, it means you have a plugin trying to add a Sidebar to a page.
Because of Weaver II’s flexible sidebar layouts, Weaver sidebar areas are not compatible
with this plugin, but this special one is. To use this area, open the
Main Options : Widget Areas : Define Per Page Widget Areas
and define a per-page area called plugin_replacement. Add widgets to the new
plugin_replacement area, and they will be displayed here on plugin pages.
so I did as directed and when I add a widget to the new widget area the widget appears across the bottom of the page – not in the sidebar area.