Thanks @Terrance_McMinn1, I’ve noticed that as well.
Not to open a new thread trad is also complaining with the following message:
Error in startup script: invalid command name "helplink"
while executing
"helplink .mess trad trad messages"
(file "/opt/radiance-renderer/bin/trad" line 103)
I found this thread but it seems outdated. Any new instructions how to make trad to work?