In some occurrences my application fails because of the following error:
response from a findAll must be an Array, not undefined
Strangely, a simple refresh solves the problem. I have also tracked the error up to the point that the serializer returns undefined. However, when adding a breakpoint there and executing the code myself it does not return undefined. Somehow it seems to be a race condition. We were able to trigger it by logging out of our application and logging back in. Then it always occurs. However, sometimes on a simple refresh it also occurs.
The question: does anyone has an idea what it could be? A starting point for my search would be perfect.