Hi, @emersonlaurentino! Thanks for your question! 🙌

Based on the error, this seems like an issue with the Cloudflare Workers SDK. I found this related issue here. The good news is, since it looks like you're using Axios, someone release a PR for a fix for this issue for Axios ~1 hour ago!

In the meantime, while that's getting reviewed, merged, and released, someone suggested this approach:

on the server-side i just check if credentials are supported and set them to undefined if not

const isCredentialsSupported = "credentials" in Request.prototype; 
fetch("...", { credentials: isCredentialsSupported ? "include" : undefined })

maybe try the above and see if it works with your use case?

@emersonlaurentino
Even after resolving this specific error, you'll encounter more errors with Bun and Cloudflare Workers because this project focuses on Node.js runtime use cases. I understand you prefer first-party tools, but I created third-party libraries to build your Slack apps on edge function platforms. Please consider using the alternative solution this time. See #1603 (comment) for more details.

👋 It looks like this issue has been open for 30 days with no activity. We'll mark this as stale for now, and wait 10 days for an update or for further comment before closing this issue out. If you think this issue needs to be prioritized, please comment to get the thread going again! Maintainers also review issues marked as stale on a regular basis and comment or adjust status if the issue needs to be reprioritized.

As this issue has been inactive for more than one month, we will be closing it. Thank you to all the participants! If you would like to raise a related issue, please create a new issue which includes your specific details and references this issue number.