Unable to get data from server

Unable to get data from server

Thanks for the help, but I’m having trouble retrieving data from MongoDB for my API. Can you help me understand why I'm not able to get the data? i have removed socket also API POST REQUEST

Unable to get data from server

https://real-time-chat-application-api-two.vercel.app/ i have developed api for my project and deployed in vercel everything is ok but unable to retrieve data from server (MongoDB) github http