[DEVICE ONLY] - ERROR TypeError: Cannot read property 'null' of null

[Olivier-Tvx]

Thanks for your help and sorry for the time taken to answer.

@rapropos

Any time you call a function that returns a future (Promise or Observable), you have three choices:

[…]

• I care, and so does whoever is calling me. In this case, declare your function to also return some sort of future, and make the very first word you type in the body be return . I don’t care if that feels awkward at first, but if you follow this rule, you will save yourself from 98% of future-related bugs and organically learn the proper operators and idioms to transform futures properly.

I guess this is the choice you are pointing to solve this error. But I don’t really understand what you mean by “declare your function to return some sort of future” and how it applies to loadSavedCards(). Have you an example in mind so I can relate to it?