Just run sudo dpkg -i libpoppler19_0.18.4-1_amd64.deb (or whatever .deb file you downloaded).
The debian-package downgrade worked for me, too.
Just run 0.18.4- 1_amd64. deb
sudo dpkg -i libpoppler19_
(or whatever .deb file you downloaded).
The debian-package downgrade worked for me, too.