Seems like you switched theme while updating .
Note that switching theme will reset widgets and menus and switching from wplms and then activating it again will deactivate the plugin also .
you need to activate the plugins again .
Please make sure that you theme and all its plugins are updated to latest version .
1. Make sure that all the recommended plugins are installed ,activated and updated to latest .
(for slider check layerslider or revolution slider plugin is installed and activated ) .
2. make sure that wplms dashboards plugin is activated and then set the widgets in the instructor and student sidebars .
refer :
https://wplms.io/support/knowledge-base/wplms-dashboards/
3. Check js errors in your site(refer :
link) that appears due to third party plugins or incomplete updates of plugins or theme .
Make sure all is updated .
4. Make sure that an edit course page is connected in the wplms -> course manager -> connect edit course page .
refer :
https://wplms.io/support/knowledge-base/wplms-front-end-plugin-1-9-9-7/
5. Same as 3 .
6. Yep they do not deactivates as they are required plugins .