The port list for the UHD-SDI GTY has changed between 2018.3 and 2019.1.
In 2018.3 the UHD-SDI GT had support for PICXO for both GTH and GTY.
In 2019.1, PCIXO support for GTY was disabled and FRACXO was added.
2018.3 - UHD-SDI GT 1.0:
2019.1 - UHD-SDI GT 2.0:
This is a known issue in Vivado 2019.1, where selecting enable PIXCO for the GTY actually enables FRACXO mode instead.
The fixes below will cause the application to issue an exception and close instead of hanging.