There are a lot of errors in there. Fixing some of them might fix others so I'd try with the most obvious first.
The bunch of kvt.sddan.com
CORS errors should be easy to identify. Either it's that remote server that has misconfigured their CORS headers, or you have somehow restricted which pages your website can contact via additional headers.
Visiting the website I just see a crap ton of CORS errors in the console. How many tracking scripts are there on that website? 😱
The getStorage()
error seems to come from a mapper.js
script. That's probably not Flarum related. Another external script?
The $ is not a function
error does come from Flarum. It means jQuery somehow disappeared. It's probably caused by one of the external scripts that maybe loads its own version of jQuery and messes up Flarum.