Adding to the discussion from an old issue here because that previous issue was already closed. Hope it helps someone else too. Encountered this issue while at work: https://github.com/realm/realm-js/issues/6190

My problem wasn't actually even related to the double or int column on my schema.

It was actually "date".

Mainly because I was doing:
{{createdAt:

}}

I know this is just some one-off mistake that I'll be able to keep in mind in the future. But I kinda wish there was some clearer error message to say that the culprit was the "createdAt" column.

I noticed this vague error message happens to a lot of the fields in Realm which makes development kind of a pain.