Google Pagespeed Insights
You might have an issue, that you have Smart Slider on your website, go to Google Pagespeed Insights and see, that you have a really low score. What you should know about Google Pagespeed Insights is that your score does not matter. It is a really bad test, which only confuses users. Let's take a look at why:
Google Pagespeed Insights won't look at the loading speed of your website
Google does not use this test
When the Google crawls your site, it looks at the actual speed of your website. This Google Pagespeed Insights result doesn't matter in where you are getting into a Google search result.
Noone actually cares about this test
Go to Google Pagespeed Insights and just insert https://www.google.com/ into the test. Currently it has an orange mobile score, so not even Google reaches the green "you are good to go" score. Why would you care if they won't care about it either? Let's take a look at some bigger website's current result:
https://www.amazon.com/ - 56
https://www.aliexpress.com/ - 37
https://www.colgate.com/ - 1
Don't use Google Pagespeed Insights. You cannot get a good result in it, and it really doesn't even matter. You can see here how you can check out your website's speed, which actually matters. If you want to improve your website, make it faster and don't just try to pass tests.