Problem WithTheme

i had not idea whats going on! i was running my favorite theme perfectly fine few days ago in my own dedicate server and started to act really slow even tho i din’t do any modification, the crazy thing it’s the theme won’t work properly on my own server now but it works on a share hosting account!

the problem is that pages take long to load when someone navigates the site
this is my blog on my server
https://documentalesdelweb.com

(any other theme will work fine. just the current one won’t but i want to find out why!

i already try , clean cache, uninstall plugins..

this is other blog i create to test theme on share account. (this is how the blog should work fast and smooth)
https://musicadelweb.com

Note!
same wordpress version, same plugins! (Not Load on server)

any help will be appreciate please ?? advice me

thank you.