I use ST for latex but today I run into this problem. I opened a .tex file and tried to build the pdf but I got the message:
Cannot find builder traditional.
Check your LaTeXTools Preferences
The error persisted after I closed the file and opened it again. I opened another tex file, same problem. Finally I quit ST, tried again, and from there on everything went fine.
I have experienced the same issue occasionally in the past but I cannot put my finger on what triggers it, or whether quitting/restarting ST always resolves it. Do others see this, or is there an issue with my setup?
Thanks