Uncaught Assertion Failed!: Descriptor for Config required for registration : undefined Callback failed
i found the error, it was very dumb... in a different component that i use there was an aura:if block that was empty and did nothing, and made everything fail. after i removed it, it worked fine
You'll also see this error if you have an empty else tag.
<aura:set attribute="else"></aura:set>
Do this instead
<aura:set attribute="else"><span></span></aura:set>
The names of your apex method and the helper controller js in your lightning components should not be same .This triggers a recursion .
Please update the name of your helper to something else
getAccountsFromServer: function(component) {
/// Rest of the code
}