patriciocs
Have you tried reinstalling Neutron.
I had trouble installing Neutron. I tried to install to paths that had "Cakewalk" in the path, but the installer puked on that. I was eventually able to force it to install in more generic vstplugins folders. But as I was doing that, the assistant first worked and later did not work.
At one point, I got a message about "bigfoot" missing, which I think is the network software used for the various Neutron instances to communicate. I would have thought that related to the masking monitor, not the track assistant. I was also having the various issues related to VST2 being used by mistake.
I cleared the old Neutron install, rebooted, and then did a fresh install of Neutron. I then disabled the VST2 versions within SONAR and everything worked perfectly after that.