1. The server credentials are wrong and I can't login to your server. Keep in mind that I can't login to your server if you provide wrong credentials.
2. Since I can't log in, you should perform debug on your own. The instructions are here.
Show me the debug message that you get and I will be able to help you further.
I got your debug information, you should refer that to your hosting company as it seems an issue on the server. The include path isn't working so is definitely something odd.
If you edited something then revert to the stock files. If you didn't modified anything then handle the problem with your hosting company.