SOLVED - Total misconfiguration in old website with Contao 2.9

Hello, I had a website running by contao 2.9 and suddenly it doesn't work.

Problems are, it seems the roots needs a / before. (in css files, js, etc..)

Now the links shows /cron.php

I don´t know why all of this happened if I didn't change nothing in the web from months ago.

The website is www.abanicospintados.com

Thanks in advance for your help!

EDIT: The problem was the base href was changed in localconfig to /cron.php. I don´t know why, but I changed it and now works fine again.