undefined method serialize_to_hash ... what's happend

This issue is a (choose one):

• Problem/bug report.
• Feature request.
• [#] Request for support. Note: Please try to avoid submitting issues for support requests. Use Gitter instead.

Checklist before submitting:

• I've searched for an existing issue.
• I've asked my question on Gitter and have not received a satisfactory answer.
• I've included a complete bug report template. This step helps us and allows us to see the bug without trying to reproduce the problem from your description. It helps you because you will frequently detect if it's a problem specific to your project.
• [ # ] The feature I'm asking for is compliant with the JSON:API spec.

Description

Choose one section below and delete the other:

Bug reports:

Please review Did you find a bug? and replace this content with a brief summary of your issue. If you can't submit a bug report template please be as thorough as possible when describing your your description. It's helpful to indicate which version of ruby and the JR gem you are using.

Features:

Please replace this line with a clear writeup of your feature request. Features that break compliance with the JSON:API spec will probably be closed.

Der Bericht nennt lediglich eine undefinierte Methode, serialize_to_hash, und enthält keine Reproduktion, Versionsangaben, Datei oder Tests. Beschaffen Sie zunächst eine minimale Reproduktion sowie die Versionen von Ruby und JSONAPI-Resources und identifizieren Sie anschließend die Aufrufstelle; der Abschluss kann erst definiert werden, wenn der Fehler diagnostiziert ist.