What happend with this?

[JaviToska]

Hi, yesterday I finished my rally circuit and decided to do the timings for tomorrow (today) because it was late and had sleep and today when I go to open, get this error
http://gyazo.com/762d8a2dbb796cbcce6520223aae07ce

Error loading trackside objects \ Materials \ objects \ house4 \ mat1
Invalid character in the given encoding. Line 1 position 1
The xpack is called Trackside_objects
Please i need help i invested 5 days....