Heroku app error, previously working fine-CodePudding

We have an app that was working fine in Heroku, now stopped working, suddenly. As per logs, it is throwing these lines:

2022-12-04T15:54:00.247653 00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/socket.io/?EIO=4&transport=polling&t=OJTs1y-" host=mentee-h4i.herokuapp.com request_id=5c69dcdd-083a-4b78-a125-cdd39778e5c9 fwd="181.165.121.110" dyno= connect= service= status=503 bytes= protocol=https
2022-12-04T15:54:05.806894 00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/socket.io/?EIO=4&transport=polling&t=OJTs3NA" host=mentee-h4i.herokuapp.com request_id=9bf65614-31e0-49e4-a2e6-affb15592aec fwd="181.165.121.110" dyno= connect= service= status=503 bytes= protocol=https

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