Chidambara
What you are seeing is not the same problem as described earlier in this thread.
The original poster here had an error message telling them that they hadn't provided a Watson API key.
You have an error message saying that, although you have provided a Watson API key, that API key is now being rejected by IBM Cloud.
There are many reasons why this might be the case, however as I don't have access to your IBM Cloud account, I cannot tell which reason.
For example, you would see that error if:
* you had deleted your IBM Cloud account
* you had deleted your instance of Watson Assistant
* you had created a free Lite Plan instance of Watson Assistant but not used it for 30 days
etc..
I don't have any visibility over what has been done with your IBM Cloud account - all I get is the response that the API key was not accepted, so that's all I can display as an error.
If you look at your Watson Assistant instance in IBM Cloud, and look at the Service Credentials that you had created there, I would hope that you would clearly see what is wrong there. But I'm afraid I'm not able to help you with that, sorry. For assistance with IBM Cloud, I'm afraid you would need to talk to their Support team.
Kind regards
D