My website has again gone very very slow

https://bathinda.xyz/logs
page is almost not opening.
I know that its a symptom of something bigger. Because some user pages are also opening very very slow.

It was going ok this morning and I didn’t do anything as an Admin.
This happened last week also and was cured in itself after 20-30 minutes.

What should I do? I don’t know what to make of logs or sidekiq.
Can someone guide me?

Edit1: I’ve noted 2 things: 1) Logs/Website opens fast on Chrome than on FF.
2) As much as I can read the logs, there are numerous warnings regarding: “Fbq is not defined” and “UnCaught Ref Error”.
3) And there are some Errors reported also, which are of too diff types to report/type directly here.