# Pavlovia- TypeError: win is undefined

**URL:** https://discourse.psychopy.org/t/pavlovia-typeerror-win-is-undefined/43923
**Category:** Online experiments
**Tags:** screen, online, pavlovia
**Created:** [February 17, 2025, 9:41am UTC](https://discourse.psychopy.org/t/pavlovia-typeerror-win-is-undefined/43923 "2025-02-17T09:41:39Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![jonathan.kominsky](https://avatars.discourse-cdn.com/v4/letter/j/a587f6/32.png) [@jonathan.kominsky](https://discourse.psychopy.org/u/jonathan.kominsky)
#### Post date: [February 20, 2025, 1:59pm UTC](https://discourse.psychopy.org/t/pavlovia-typeerror-win-is-undefined/43923/8 "2025-02-20T13:59:23Z")

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I belatedly realized that something like this is probably the underlying issue: [TypeError: undefined is not an object (evaluating 'win.\_psychoJS') - #2 by jonathan.kominsky](https://discourse.psychopy.org/t/typeerror-undefined-is-not-an-object-evaluating-win-psychojs/43979/2)

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