As I've talked about previously, there were some pretty major changes this patch. I was almost successful in fixing all the bugs before the servers came back up, but alas I missed a few things which caused various errors as well as introduced a brand new error with an unrelated change I had made.
After all the "chaos" that is patch day, I'm pretty confident that any bugs introduced with patch 4.3 have now been fixed. If you are still experiencing issues, see the following thread.
Thanks for your patience. Happy patch day.
PS: Fun fact, the main TradeSkillMaster module by itself had over 15k downloads today as of me writing this.