Importing exported project fails at 70–85% (400 / 500 errors)

Help & Support
1

Hi,

I’m trying to re-import a previously exported PlayCanvas project.

Project details:

  • Archive size: 977 MB (zip)
  • Exported via standard PlayCanvas export
  • Upload starts normally
  • Import progresses to ~70–85%
  • Then import stops and fails

Console errors:

Failed to load resource: the server responded with a status of 400 (Bad Request)
Failed to load resource: net::ERR_CONNECTION_RESET
POST https://playcanvas.com/api/upload/complete-upload 500 (Internal Server Error)

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The failing file in console:
artefakt_old_2026_1_18-14_33_26.zip

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image751×201 7.89 KB

Additional info:

  • There is enough storage available on the account (10 GB limit not exceeded)
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  • Internet connection is stable

  • The error repeats multiple times before final failure

  • The upload seems to complete partially before the 500 error on /complete-upload

Questions:

  1. Is there a size limit per single project import?
  2. Could this be a timeout during server-side unpacking?
  3. Is there a way to split the project or bypass the web importer?
  4. Is there a known issue with large zip re-import?

Any guidance would be appreciated.

2

@KPal @will

3

To check, is this an archive of a project or an exported build? If you unzipped it, what files do you see?

4

This is the project archive
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image1649×415 129 KB

5

Yeah that looks like an archive zip