Tengo un gran problema con nuestro proyecto y no puedo abrirlo. Espero que puedas ayudarme. Probé todas las otras soluciones que encontré en Google, pero nada pudo ayudarme con eso. este es mi error:

 mongooseError: The `uri` parameter to `openUri()` must be a string, got "undefined". Make sure the first parameter to `mongoose.connect()` or `mongoose.createConnection()` is a string. at NativeConnection.Connection.openUri (/Users/user/Desktop/NEu/1/project-main/node_modules/mongoose/lib/connection.js:684:11) at /Users/user/Desktop/NEu/1/project-main/node_modules/mongoose/lib/index.js:330:10 at /Users/user/Desktop/NEu/1/project-main/node_modules/mongoose/lib/helpers/promiseOrCallback.js:32:5 at new Promise (<anonymous>) at promiseOrCallback (/Users/user/Desktop/NEu/1/project-main/node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:10) at Mongoose._promiseOrCallback (/Users/user/Desktop/NEu/1/project-main/node_modules/mongoose/lib/index.js:1151:10) at Mongoose.connect (/Users/user/Desktop/NEu/1/project-main/node_modules/mongoose/lib/index.js:329:20) at Object.<anonymous> (/Users/user/Desktop/NEu/1/project-main/server.js:37:10) at Module._compile (node:internal/modules/cjs/loader:1101:14) at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10) [nodemon] app crashed - waiting for file changes before starting...

Muchas gracias