<kuid2:45324:555100:19> Jointed Rail Smart Signal library v1.77 is what I show installed in my TRS19 from the DLS. the error you note above usually means part of a script is missing for some reason, like the .gs file isnt found, and as a result all of the signals that rely on this code are marked as having an error and will not show - they are still there on your route but they wont display in an error state. perhaps try removing the library you have from the installation and re-downloading it?
for TRS2012 the last version of the signal library is on the JR site. :17 is the last one that will work in that build iirc.