# Development setup

**URL:** https://discourse.processing.org/t/development-setup/43657
**Category:** Libraries
**Tags:** contributions
**Created:** [January 9, 2024, 6:56am UTC](https://discourse.processing.org/t/development-setup/43657 "2024-01-09T06:56:30Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![faisu](https://avatars.discourse-cdn.com/v4/letter/f/8e8cbc/32.png) [@faisu](https://discourse.processing.org/u/faisu)
#### Post date: [January 9, 2024, 6:56am UTC](https://discourse.processing.org/t/development-setup/43657/1 "2024-01-09T06:56:30Z")

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This the line where I am getting error in:  
It is in server/server.js line 32:  
“const MongoStore = connectMongo(session);”  
The error is TypeError: Class constructor MongoStore cannot be invoked without ‘new’

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### Author: ![quark](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/quark/32/26_2.png) [@quark](https://discourse.processing.org/u/quark)
#### Post date: [January 9, 2024, 1:49pm UTC](https://discourse.processing.org/t/development-setup/43657/2 "2024-01-09T13:49:04Z")

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Welcome to the forum 😃

Unfortunately your question lacks any detail - no hint of what library you are using - no context for the code. I suggest you read the [Guidelines](https://discourse.processing.org/t/guidelines-asking-questions/2147/8) and then edit your question to give more information about the problem.