# Need help troubleshooting "Not connected to development server" Preview is not showing

**URL:** <https://forum.builder.io/t/need-help-troubleshooting-not-connected-to-development-server-preview-is-not-showing/15905>\
**Category:** Technical Questions\
**Created:** [October 31, 2025, 4:33pm UTC](https://forum.builder.io/t/need-help-troubleshooting-not-connected-to-development-server-preview-is-not-showing/15905 "2025-10-31T16:33:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![d.softtest](https://avatars.discourse-cdn.com/v4/letter/d/34f0e0/32.png) [@d.softtest](https://forum.builder.io/u/d.softtest)\
**Post date:** [October 31, 2025, 4:33pm UTC](https://forum.builder.io/t/need-help-troubleshooting-not-connected-to-development-server-preview-is-not-showing/15905/1 "2025-10-31T16:33:36Z")

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**Preview not working**  
Hi I keep receiving this Connection disconnect and it does not tell me how to resolve this issue. It seems to only be impacting this project, the other project’s preview is working.

When I hover over the connection icon, it only states “Not connected to development server”. I’ve tried to clear cookies, what else can I do?

The chat bot is still accepting prompts and seems to be processing them, but I am unable to actually see any changes. Anyone run into this before?

 ![Screenshot 2025-10-31 at 12.07.50 PM](https://us1.discourse-cdn.com/flex020/uploads/builder/original/2X/1/14f5e4179909abc53cd653130c874f1f59d7746b.png)

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**Author:** ![sheema](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@sheema](https://forum.builder.io/u/sheema)\
**Post date:** [November 5, 2025, 11:48am UTC](https://forum.builder.io/t/need-help-troubleshooting-not-connected-to-development-server-preview-is-not-showing/15905/2 "2025-11-05T11:48:48Z")

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Hi @d.softtest could you please share the project URL where this is happening?