Hmmm, I'm not exactly sure what the cause is, but if you go to your "%LocalAppdata%/nuclearthrone/mods/" folder, delete the "NTTE" folder you find in there, and then manually redownload the latest version it should work
Thanks, it works.
Another glitch: Minutes ago, i was playing steam coop game with my friend in NTT 9944 version, my pet was Slaughter and his pet was Parrot, when my pet died in underwater 3-1(trench), he tried to save my pet and the game was desync after he pressed E key twice. The connection was aborted and Slaughter became his pet in his game but it was just revived in my game.