mongoweb error

[sysnasri]

Hi,
when I want to add a new connection from the same namespace as well as another namespaces on kubernetes it gives the following error.
GET /app 302 1.964 ms - 62
/app/user/node_modules/mongodb/lib/utils.js:123
process.nextTick(function() { throw err; });
^

TypeError: Cannot read property 'size' of undefined
at /app/user/routes/common.js:73:75
at handleCallback (/app/user/node_modules/mongodb/lib/utils.js:120:56)
at /app/user/node_modules/mongodb/lib/db.js:314:20
at /app/user/node_modules/mongodb-core/lib/connection/pool.js:469:18
at processTicksAndRejections (internal/process/task_queues.js:82:9)