Unable to write config file. CHMOD 777 on the folders /data/ and /back

[Connie]

I have one suggestion: get in contact with your hoster's support

all these problems are not GS problems, but hosting problems ans even when we know about that, we are not able to help you out
the reason can be a php update or some security tasks they installed, who knows? We not ;=)

it's their job to configure your webspace that your installations can run stable and smooth and you pay for that

Please tell us whether your problem is solved