This is a new installation of SE which was upgraded to the latest version. It has no 3rd party plugins installed yet. I purchased a spanish language pack from an authorized developer, and as soon as I uploaded the .cvs file, the site crashed. Probably, the language pack was not ready for the new SE version, or else.
I need urgent help to get this site up again and/or make a new and fresh installation of SE. This website will be used intensively for the next 3-4 months, so it's highly possible that I will also hire you for regular work during this period, installing plugins and keeping the site tuned.