Using rules to query MySQL, Attempt to access memory outside buffer bounds

I set up rules for users when logging in to my app, which queries a MySQL database that I have hosted on a server to see whether the user is authenticated, and I got the following error:
{
“error”: “access_denied”,
“error_description”: “Attempt to access memory outside buffer bounds”
}
I’m not sure what this is - does that mean I have to be a paying member to use rules to check my own database at login? Thank you very much.

Hey @ernest-ohalo, Welcome to the Auth0 Community!

You should be able to make external API calls from rules provided you have whitelisted the auth0 IP address.

If you have whitelisted the IP addresses, the errors might be linked to the usage of package e.g:
https://github.com/tediousjs/tedious/issues/853

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