I am suddenly getting "Segmentation Errors" on my machine. Netclient stopped working and I can't do netclient uninstall because it is throwing the error. In fact, I can't do any netclient commands at all.

The issue might have been caused by some operation on your OS. Could be a failed update or an incidental minor fault of one of the hardware parts. Or maybe premature termination while netclient is being installed or being updated.

Reinstall netclient. It will automatically override/replace the existing faulty or corrupted one. Re-join your machine to the network if necessary.