Change8
Error4 reports

Fix MiniflareCoreError

in Cloudflare Workers

Solution

MiniflareCoreError often arises from conflicting or improperly configured bindings, especially when using browser bindings or multiple workers in the same environment. Ensure all bindings are correctly defined in your wrangler.toml or CLI arguments and that there are no conflicting binding types (e.g., attempting to use browser bindings with module workers simultaneously). If using multiple workers, verify each worker has unique binding names to avoid overlapping modules. Finally, double-check that the referenced modules in your bindings are correctly present and resolvable in your project.

Timeline

First reported:Nov 25, 2025
Last reported:Dec 19, 2025

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