Getting 500 Internal Server Error when using Auth0 rules – how to debug this?

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I’m encountering a 500 Internal Server Error during login after adding a custom rule in Auth0. The rule is meant to assign roles based on email domain, but now authentication fails. I’ve checked the syntax, but the error persists. How can I debug this properly? Is there a way to view detailed logs or trace what part of the rule is failing? Any help would be appreciated.

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Hi @marcustaylor881,

Thanks for your question.

To debug your Rules script, you could try the Real-time Webtask Logs Extension.

Let me add that Rules have been deprecated for some time, and any existing Rules are read-only. There’s a warning that you can find on the Dashboard which mentions:
image

We now encourage using a Post-Login Action, which also happens during the post-login part of the authentication flow.

Let me know if you need any further help.

Cheers,
Rueben

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Thanks for your valuable input. I’ll get back to you if I face any issue while implementing your solution.

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Hi @marcustaylor881,

That sounds good!

Good luck with the implementation, and I’ll be here if you need any help.

Cheers,
Rueben

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Thanks @rueben.tiow For your Support

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