Sydney Slides suddenly disappear! Home and others sites working bad! Please help

Hello! I usually enjoy so much your Sydney theme! Thanks! But today, for the very first time, I have gone to my web-site and I find a lot of very strange things… The slides suddenly have “disappeared” from my homepage , and if you see it, also at the left and right sides are not complete, there are with white spaces… Also the colors in the footer of all the sites have changed! I have tried to fix it as “always” with all the customization options, but nothing works…!

Also in all the other sites (sub-pages) and posts, it seems that “the header (where the menu is) always “covers” some information (the first lines or pictures), please I would like you to take a look of my web page… https://gmc-peru.com/

However, I don’t know why when I go to “Customize” “sometimes” I see there the right web page as always (OK), but others “don’t” it have the same mistakes, however when I go to see my page like a normal user in 3 different computers and browsers, “always” everything looks “wrong” totally different from just yesterday! I don’t know what is happening?! Please I need your help!

The Sydney Theme is version 1.38

Tell me please if you need pictures or if you need more explanations…

My page is https://gmc-peru.com/

Thank you in advance for a prompt reply and help!