Suddenly my webiste superhost.gr running my main python script presents me with this error:

Code:
UnicodeDecodeError('utf-8', b'\xb6\xe3\xed\xf9\xf3\xf4\xef \xfc\xed\xef\xec\xe1 \xf3\xf5\xf3\xf4\xde\xec\xe1\xf4\xef\xf2', 0, 1, 'invalid start byte')
Does anyone know what this means?