Hi Varun,
Are you getting this error on deployed environemnt (test/accp/prod) or on localhost?
If its on environment make sure you enable /link/ request handler (you can do this in Network tab under your app environement details) or if this error is on your localhost than make sure you check the deeplink is configured correctly, specially make sure in project security that Anonymous user has the correct rights. If this doesn't solve your issue then please can you update your question with more information.
Hope this helps!
Cheers,
Mohammed Siddiqui