[2019] Game fails to load to the title screen, digital and disc

Hello @ForlornWolf, welcome to the community!

Have you tried to delete the saved data for Conan Exiles?
There could be some sort of conflict, corruption or incompatibility with previous data left over from the trial.

Alternatively, did you try to perform a soft factory reset ( keeping games and apps )?

Did you also try to reset the cache by holding the power button for about 10 seconds until the console powers off, then disconnecting it from the power outlet for a couple of minutes?