Seems to be working for me too. Switch to the JAR launcher through the twitch application
Have the same problem here, I don't use Twitch app. Does anyone know how to manually launch the JAR files without Twitch app?
Also, I deleted my user data whilst trying to fix this. Is there a way I can create a new account and update the clientToken to be exactly the same as my old user? So when I login to my server my inventory items remain the same, or are the inventory items stored locally client side?