as of linux 64bit seems like you have to run in 32bit mode aswell
by running in an 32bit jre? I did so but the settings window does not open. I just installed spark 2.6.2 from the rpm package (at least this one can not be installed on 32bit systems), wich comes with a 32 it jre bundeld to it. But the settings window still doesn’t open. Btw. the file transmission doesn’t work as well.
Okay, I fixed it. I had to add lti-civil.jar to the classpath ($SPARKDIR/lib/lti-civil.jar in /usr/bin/spark) and libcivil.so to the java library path.