We should install old packages for openjfx for Java 8 not only one openjfx:sudo apt install openjfx=8u161-b12-1ubuntu2 libopenjfx-java=8u161-b12-1ubuntu2 libopenjfx-jni=8u161-b12-1ubuntu2 openjfx-source=8u161-b12-1ubuntu2And protect it for updatesudo...