Serious error in the template

Site: http://www.ledicoladelsud.it
The main problem of the website is that every non-cached page generates a php process that spends at least 30 seconds searching for images in the WordPress root directory. Basically, every time you call up a non-cached page, WordPress makes all those useless calls to images that don’t even belong to the page called up.
Unfortunately from my testing I have only found one way to not have these calls made; the deactivation of the “TagDiv Composer” theme plugin which however is a mandatory plugin of the theme and without it the pages are not displayed correctly.
The processes that accumulate create a huge load on the VPS. Even by dramatically increasing the CPU (and RAM) of the VPS, the new resources would be saturated again as the processing of each process which should last a few milliseconds, instead lasts more than 30 seconds.
If you are unable to intervene on the code side, you need to urgently contact theme support to understand if they have a solution to ensure that the dynamic page generation processes do not perform all those useless calls that slow down both the navigation than the server (load on the CPU).

Hello, we are currently experiencing the same problem. The website is loading fast and out of nowhere, it became slow, very slow.
When you deactivate the Tagdiv plugin, we notice that the site becomes faster again.
What to do?