Hi Josh,
This could be an incompatibility with some system libraries included in the Linux PixInsight distribution. Try removing these files on the bin/lib distribution directory:
libbz2.so.1
libbz2.so.1.0.6
libcrypto.so
libcrypto.so.10
libcrypto.so.1.0.1e
libexpat.so
libexpat.so.1
libexpat.so.1.6.0
libffi.so.6
libffi.so.6.0.1
libicudata.so
libicudata.so.50
libicudata.so.50.1.2
libicui18n.so
libicui18n.so.50
libicui18n.so.50.1.2
libicuuc.so
libicuuc.so.50
libicuuc.so.50.1.2
libidn.so
libidn.so.11
libidn.so.11.6.11
libpcre.so
libpcre.so.1
libpcre.so.1.2.0
libpng15.so
libpng15.so.15
libpng15.so.15.13.0
libpng.so
libssh2.so
libssh2.so.1
libssh2.so.1.0.1
libssl.so
libssl.so.10
libssl.so.1.0.1e
libuuid.so.1
libuuid.so.1.3.0
libwebp.so
libwebp.so.4
libwebp.so.4.0.2
libz.so
libz.so.1
libz.so.1.2.7
Some of these files are symbolic links - better use your graphical file manager (Nautilus, Dolphin, etc) for simplicity. DO NOT REMOVE the following files:
libmozjs-24.so
libQt*
qt-plugins
Another possibility is a conflict with the Qt5 implementation included with Fedora 23, although this should not happen normally.
Keep in mind that when using Fedora you are risking software and hardware incompatibilities, as well as support problems with existing software, especially proprietary multiplatform applications like PixInsight, VMware, etc. For this reason we have erased any trace of Fedora from our development machines. We now use Red Hat Enterprise Linux 7.1 exclusively. Fedora is very cool to keep oneself in touch with the bleeding edge of software development, but definitely a poor choice when one depends professionally on a working machine.
