I have observed this same thing with another user and I believe the problem lies with the shared network Eclipse that you have mapped to drive Q. Although it works in normal circumstances to be able to have a shared instance of Eclipse, it doesn't appear to work nicely with LeanFT.

If you move the Eclipse folder to your local drive, such as using C:eclipse and then doing the install, pointing it the local directory of Eclipse seems to allow the install to complete correctly and configure everything. Also, make sure the LeanFT engine has started before you start working with LeanFT in Eclipse. You can check the system tray to see if it is running or not.