Thanks, Caridad, I have resolved the problem w/sidebar display.Answer to your question: Sidebars are created by plug-ins in widgeted areas of theme (Weaver II Pro). Solution was to delete a post created when Types and Views was malfunctioning; recreate the post after I installed updates of T and V, then reset the plug-in that assigns sidebar content (archive listing). In hindsight, pretty logical, but rather perplexing at the time the issues were hammering me.
Thabks again for your great support.