Sidebar widget not showing up

this theme uses CSS grid, ensure that your browser supports that, or else it will not display the sidebar. theme does not use fallback code for browsers that do not support CSS grid, like my version of Chrome. I play around on an old XP computer and Chrome and Firefox will no longer update to the latest browser levels, so until I get a new machine, some things like CSS grid will not work on Chrome, but it will on the version of Firefox I can run. good luck, Al