# Platform unknown instead of PSYCHOJS when syncing experiment to pavlovia / 404 not found

**URL:** <https://discourse.psychopy.org/t/platform-unknown-instead-of-psychojs-when-syncing-experiment-to-pavlovia-404-not-found/38764>\
**Category:** Online experiments\
**Created:** [February 21, 2024, 3:05pm UTC](https://discourse.psychopy.org/t/platform-unknown-instead-of-psychojs-when-syncing-experiment-to-pavlovia-404-not-found/38764 "2024-02-21T15:05:33Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [February 21, 2024, 5:39pm UTC](https://discourse.psychopy.org/t/platform-unknown-instead-of-psychojs-when-syncing-experiment-to-pavlovia-404-not-found/38764/6 "2024-02-21T17:39:20Z")

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Here’s that error.

> [@TypeError: Number.IsInteger is not a function](https://discourse.psychopy.org/t/typeerror-number-isinteger-is-not-a-function/37608):
>
> URL of experiment: [WTK\_Newstories [PsychoPy]](https://run.pavlovia.org/socialdecisionlab/wtk_newstories) Description of the problem: This error (TypeError: Number.IsInteger is not a function) comes up I can’t work out the cause of it. It begins at the first point after instructions, trying to draw basic text to a screen. It does not matter if the text comes from an input file or if I just type it in the box. It works fine in PsychoPy, using the automatic translation to JS. I have been trying to troubleshoot for a few hours now, and I am still stumpe…

Variable names to avoid are: class, core, final, image, index, Length, list, Object, Number, round, sound, Symbol, t, thisTrial, trials, util, visual.

> **[PsychoPy Python to Javascript crib sheet 2023](https://docs.google.com/document/d/1TSEgiG3SeGSr7LWoRahTZm7vk_loU8zKoDQh2sV1KFw/edit?usp=sharing)**
>
> This Doc is private

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