how i can fix this error MongoParseError: Invalid scheme, expected connection string to start with

how i can fix this error
MongoParseError: Invalid scheme, expected connection string to start with "mongodb://" or "mongodb+srv://"

how i can get mango url like this from railway ?

N/A

MONGO_URL should be the variable you want
https://docs.railway.app/databases/mongodb

if your package expects a different syntax, then you could create a meta URL variable with a specific syntax using templated variables
https://docs.railway.app/develop/variables#templated-variables