Clion on Redhat 6.5 java is running but no User Interface appears

In a nutshell, when I run clion.sh, I get no error messages, but it continues to run.  If I look at the prcess table, I see a copy of java running from the clion distro, but no UI comes up and I see no error messages.

I had to do a couple of things to get this thing as far as I did : 

(1) Added a fake "realpath" to the bin directory that just does 'readlink -f -- "$@" '

(2) I built a version of glibc-2.14.1, to make Java happy (it was failing with a message "/lan/mfg/softshare/danh-store/Software/clion-2021.3.4/jbr/bin/java: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by /lan/mfg/softshare/danh-store/Software/clion-2021.3.4/jbr/bin/../lib/jli/libjli.so)"

Any pointers on where to look for logs, how to debug, etc?

Thanks!