Zulu is not able to open some system files that it needs to read in order for a Java program to function correctly.
RedHat Enterprise Linux 8.1 introduced a mechanism for "whitelisting" Applications to provide some assurance that a particular executable binary could be trusted to access certain files. The fapolicyd daemon makes the decision, based on its configuration. The configuration files are:
/etc/fapolicyd/fapolicyd.conf - daemon configuration
/etc/fapolicyd/fapolicyd.rules - access control rules
/etc/fapolicyd/fapolicyd.trust - admin defined trusted files
If the rpmdb is set as a trust source and you installed Zulu from a .tar.gz, then Zulu won't be in the rpmdb, and can't access the files it needs to because it isn't trusted.
Either change the fapolicyd configuration to allow Zulu to access the files it needs, or install Zulu from an RPM.