What could cause this error?

[Gramofoni]

Hi, our site has this error in edit mode , we have many other pages made with same style and settings and they work ok. screenshot here

and the page is this page http://www.gramofoni.fi/kari-hirvonen/

[tristup]

Hi Jimi,

Thanks for reaching out.
It seems you are using the much older version of Pro i.e. 2.4.6, which might be the reason behind your problem. I would suggest you please copy your live site to a staging server and update the Pro, and if everything goes fine in your staging to please migrate the staging server to live.
As you are using a much older version you may need to create a few pages from scratch as a few of the shortcodes and elements are already deprecated in the newer versions.

Hope it helps.
Thanks