Good error messages are hard. You want to tell the user what to do, but if you knew that the error could be thrown, you probably should have been gracefully handling the problem. You don't know what information is useful to a hacker and you don't know how your error will be propagated. Meaningful errors at one level ("incorrect parameters passed" when calling an API) is perfectly useless at another level ("incorrect parameters passed" when interacting with a React UI). And if you respect all of the above, at some point you'll end up with an error message that basically says "I can't tell you what, why or how something went wrong, but it did."