Error when saving

On top of that, there are other flaws like the GRID that suddenly became weird and is no longer alined to the containers and lines that previously was.
I have duplicated already the website, but the new one does not come with all the things i have added already, duplicated only the page im working on but it doesnt seem to work. I did what you suggested but it is just not working and not being able to save or publish.
I don’t know what i should do about it.