I have made a simple bot for Google Chat, which has been working perfectly fine for the past couple of weeks. I tried to make a change to the API configuration for Hangouts Chat, and am greeted by this error.
I have tried making different changes to the API, and receive the error every time. Even simple things such as disabling the bot status gives me the same issue.
I tried re-making the project from scratch, as well as trying a different account on the same domain. The issue persists.