This error message means that you copy of JPEG to RAW AI cannot connect to our servers to authenticate your login. Typically, this is due to a firewall or some other program blocking JPEG to RAW AI from connecting to the internet.
If you see this error message please disable your firewall and try logging in again. Your firewall could be blocking our web request to verify your credentials.
If you still can't login it could be because of the permissions configuration on your machine. Every machine is different, but sometimes the MacOS wants you to manually say that you trust an application to write to your disk. You can do so like this.