# File upload widget \*Upload failed\*

**URL:** <https://forum.knime.com/t/file-upload-widget-upload-failed/91290>\
**Category:** KNIME Business Hub\
**Tags:** bug\
**Created:** [January 29, 2026, 1:24pm UTC](https://forum.knime.com/t/file-upload-widget-upload-failed/91290 "2026-01-29T13:24:43Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Bruno\_Falcao](https://forum-cdn.knime.com/user_avatar/forum.knime.com/bruno_falcao/32/84565_2.png) [@Bruno\_Falcao](https://forum.knime.com/u/Bruno_Falcao)\
**Post date:** [January 29, 2026, 1:24pm UTC](https://forum.knime.com/t/file-upload-widget-upload-failed/91290/1 "2026-01-29T13:24:43Z")

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KNIME Server: 5.9  
KNIME workflow: Developed in 5.4.3  
Deployed as Data app

Im facing a problem while im trying to upload a zip file with the file upload widget.

![image](https://forum-cdn.knime.com/uploads/default/original/3X/d/9/d9b0e37e66733cbe18ee7103cbe20838b9ee6613.png)

Sometimes it works, but when i got this error i have to wait few hours until this issue get out of my way.  
Another user reported to me the same error with another data app.

I tried switching browsers and using incognito mode, but I still struggled with it.  
Someone can help me?

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**Author:** ![Bruno\_Falcao](https://forum-cdn.knime.com/user_avatar/forum.knime.com/bruno_falcao/32/84565_2.png) [@Bruno\_Falcao](https://forum.knime.com/u/Bruno_Falcao)\
**Post date:** [January 29, 2026, 2:55pm UTC](https://forum.knime.com/t/file-upload-widget-upload-failed/91290/2 "2026-01-29T14:55:56Z")

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Observing my own workflow, i noticed that when i save after a test with the components(I.O) even if i reset the workflow, he saves with the size of the archive inputs.  
The middle proccess of my workflow are this

 ![image](https://forum-cdn.knime.com/uploads/default/original/3X/1/1/1195524ebde4ca10235851ef9bd73f5710288312.png)

To abroad this problem, i have to create a local workflow with same name as my PreProd WF, run the flow, test, and reset to upload in PreProd to overwrite my version, then i got a sketch to launch a new version working well.

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**Author:** ![Syndra\_Casper](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/s/df788c/32.png) [@Syndra\_Casper](https://forum.knime.com/u/Syndra_Casper)\
**Post date:** [February 11, 2026, 8:59am UTC](https://forum.knime.com/t/file-upload-widget-upload-failed/91290/3 "2026-02-11T08:59:47Z")

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If it’s failing immediately, it might be worth checking the file size limit on the KNIME Server/Hub configuration. Sometimes the default is set lower than you’d expect, causing the widget to just ‘give up’ without a clear error message.

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<div class="post-metadata">

**Author:** ![Bruno\_Falcao](https://forum-cdn.knime.com/user_avatar/forum.knime.com/bruno_falcao/32/84565_2.png) [@Bruno\_Falcao](https://forum.knime.com/u/Bruno_Falcao)\
**Post date:** [February 25, 2026, 11:49am UTC](https://forum.knime.com/t/file-upload-widget-upload-failed/91290/4 "2026-02-25T11:49:45Z")

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Seems that is a problem with the navigator or something like that, when i switch the archive or simply copy the content of .zip to another .zip, i can upload the archives.  
About the size of my workflow, i dont know what happened… seems like a cache…