@VSK said in Stuck installing ros-melodic-pcl-conversions:
configure python-twisted-core:all 17.9.0-2ubuntu0.3 <none>
status half-configured python-twisted-core:all 17.9.0-2ubuntu0.3
Maybe that package got corrupted on the install. Can you try running sudo apt-get clean?
If that doesn't work, you could also try removing both of the packages and do the install again.
$ sudo apt remove python-twisted-core:all
$ sudo apt remove ros-melodic-pcl-ros ros-melodic-pcl-conversions