Migrate websites from live site to development site.
Solution:
I suggest you try to migrate full site(files and databases) from live website to a new development site(different domain name), and do the development work in the dev site, after all things are done, migrate full site from dev site back to original live website.
This will be able to avoid any files or data missing when you importing/exporting the website, and avoid other conflicts(difference in the shortcodes)
Problem: The map marker is displayed in the correct location on the backend of my site, but the map on the front-end of the site does not show a marker.
Solution: Be sure to add the marker shortcode along with the map shortcode if using the classic editor. Both are required to display a map with a location marker.
Problem: I would like to use a widget to display a grid of related posts in my sidebar. The posts should be related to the taxonomy terms of the post being displayed.
Solution: Create a View and add a taxonomy Query Filter where the term is set by the post where the View is shown. Use the WP Views widget to insert that View in the sidebar. To make a dynamic widget title, recreate the title using the wpv-post-taxonomy shortcode in the View and leave the widget title empty.
Display all search results of a category to a page.
You can see the header "Upcoming Classes" on this page with no results displaying. I have created two sample posts for this category, but they do not display.