My bot was built with the Microsoft Bot framework Node.js SDK, the bot is deployed on an IIS Server and it has been working well for over a year.
A few days ago, it stopped working I tested it with the bot framework v4 and I get responses, but there has been no response from the awakening messages sent to it on Teams.
This is what I found in the bot's log on IIS.
node:14628) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(node:14628) UnhandledPromiseRejectionWarning: Error: BotFrameworkAdapter.processActivity(): 400 ERROR
SyntaxError: Unexpected end of JSON input
(node:14628) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:14628) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
However, a corresponding version of the bot deployed on Azure works fine on Teams. please let me know if I need to provide more information.