From my experience it is normally linking issues and missing libraries that break gst-inspect.
Try removing the registry cache:
rm .cache/gstreamer-1.0/registry.x86_64.bin
and run gst-inspect again, if you are lucky it will tell you what is wrong
Otherwise I had also experienced issues when there was a naming scheme change in 1.14:
https://github.com/alumae/gst-kaldi-nnet2-online/issues/67