I've ran into similar issue in the past and I'm fairly sure it started to occur when I removed USBX from my project (seems like it's ThreadX in your case). The error appears in your makefile file and the only fix I could find for it was to go to linker library settings (Project Properties >> C/C++ Build >> Settings >> Cross ARM C Linker >> Libraries) and make sure both lists (top and bottom) match each other (i.e. the order is the same and there aren't any additional entries on either). When you remove the library from the project, it seems like search path is not always cleaned up and can cause issues (because the path no longer exists).
Hope this helps.