I am new to destiny playing it for the first time last week. I started getting a hang of things, watching videos, learning from my friends on how to play and upgrade weapons. While I was streaming to my friends on discord they noticed that NONE of my weapons that usually could be tier enhanced were not available at all to be enhanced. They thought it was weird but we couldn't find anything online relating to my issue. Hopefully this is just a bug because it would suck if I could never enhance any weapons. Thank you for reading this and helping out if you can!