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Reported problemNot a verified signal

Python Workers deployment fails with "Dynamic require of 'fs' is not supported" (Error 10021) using minimal pywrangler project

Python Workers deployment fails with "Dynamic require of 'fs' is not supported" (Error 10021) using minimal pywrangler project

SourceGitHub
Communitycloudflare/workers-sdk
DateAug 6, 2026
Independent reports1

Important limitations

  • This may be one public report, not widespread demand.
  • Current independent report count: 1.
  • This is currently a single independent report. It has not passed clustering or human review as a verified signal.
  • No market size, willingness to pay, competition, or trend claims are inferred here.

What was reported

Who is affected
Frontend application developer
Job to be done
Deploy a service reliably
Workflow
Python Workers deployment fails with "Dynamic require of 'fs' is not supported" (Error 10021) using minimal pywrangler project
Desired outcome
Not enough evidence yet.
Severity
Not enough evidence yet.
Urgency
Not enough evidence yet.

Evidence indicators

Evidence records1
Independent reports1
Reproduction notesPresent
Metrics mentionedNot observed
Logs mentionedPresent
Corroborationuncorroborated

What would upgrade this

  • Additional independent reports from distinct communities or authors.
  • Human clustering into a review signal, then explicit publication approval.
  • Counter-evidence review and durable original-source verification.

Original source

Open the original public report