So I was editing some of The New Custodian theme templates and clicked on Save and suddenly that template in particular stops working :O
Then I open again the same template in Editor and noticed that all the code is in blue letters (not formatted by color as normal) See attachment.
For example, I edited file article_cont.tpl and changed text from English to Spanish and clicked on Save and article page brokes. I open the banner template, I just clicked on Save without making any changes and that template stops working too.
Every tpl file I edit turns to blue code so I broke all the site /:
UPDATE: I discovered that everytime I clicking on Save it adds a slash to a variable and that breaks the tpl file, example: