It's a little fuzzy, but I do remember some things. I remember there being a kid who had a brother, maybe his twin, and a blonde mother.
There is some kind of magic council of maybe 7 people who are trying to protect the world from a really bad guy. The main good guy is older, with an accent, and dark hair, maybe British, but he was not as old-looking as Gandalf. He finds and mentors the kid, and beyond that I think the kid saves the world and his brother in the process.
I remember something about some signs needing to occur. I also have a vague recollection of a magical fight on a bridge.
It's not Spiderwick Chronicles and it's not Seventh Son.
I first saw the movie via Amazon or SlingTV back in 2016 or so.