BadRequestError: Missing required parameter: transaction_id

[RahatAhmed171]

Hi, I've following this tutorial to understand the OAuth flow and also to create custom oauth2 server.
Whenever I hit "Allow" button, it shows this error. I saw comments in the blog showing same error faced by the users.

BadRequestError: Missing required parameter: transaction_id
at SessionStore.load (C:\Users\User\projects\nodejs projects\beerlocker\node_modules\oauth2orize\lib\txn\session.js:25:25)
at transactionLoader (C:\Users\User\projects\nodejs projects\beerlocker\node_modules\oauth2orize\lib\middleware\transactionLoader.js:42:24)
at Layer.handle [as handle_request] (C:\Users\User\projects\nodejs projects\beerlocker\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\User\projects\nodejs projects\beerlocker\node_modules\express\lib\router\route.js:144:13)
at complete (C:\Users\User\projects\nodejs projects\beerlocker\node_modules\passport\lib\middleware\authenticate.js:271:13)
at C:\Users\User\projects\nodejs projects\beerlocker\node_modules\passport\lib\middleware\authenticate.js:278:15
at pass (C:\Users\User\projects\nodejs projects\beerlocker\node_modules\passport\lib\authenticator.js:428:14)
at Authenticator.transformAuthInfo (C:\Users\User\projects\nodejs projects\beerlocker\node_modules\passport\lib\authenticator.js:450:5)
at C:\Users\User\projects\nodejs projects\beerlocker\node_modules\passport\lib\middleware\authenticate.js:275:22
at IncomingMessage.req.login.req.logIn (C:\Users\User\projects\nodejs projects\beerlocker\node_modules\passport\lib\http\request.js:44:13)