My Winflector always crash when I enter a domain name and hit the save button on a windows server 2012 r2... it only worked on the first time it was set up. I wasn't able to access the server with an authorized AD user, too. I got always the message that the user wasn't in an authorized group (but it was!). I have also reinstalled winflector a couple of times without success. how can I fix these issues?