If the plugins are ok and the themes are ok, then what? the core files?
It looks as been a permissions problems, as far as I have seen every single file is 644 and every single directory is 755.
I asked the webhost, they resetted the permissions for the whole directory. It did not make it.
Then I reloaded most of the core, “wp-admin”, “wp-includes” and the main directory. No results.