Hello,
1) What plugin did you try to update? We tried to update one of the plugins and did not face any notices http://prntscr.com/qbn6ir 2) Contact plugin author and make sure that you used correct classes to make plugin work http://prntscr.com/qbn7kz We think that you need to use the following selectors http://prntscr.com/qbnaem 3) Read theme docs about site speed optimization https://xstore.helpscoutdocs.com/article/100-how-to-speed-up-my-website
Regards
