Ah, C++ error messages - where the compiler turns into a cryptic pawn shop owner saying "Best I can do is confuse you."
When you ask where the problem is in your code, C++ hands you a 47-line template instantiation error pointing to a library file you've never touched, with helpful gems like "no known conversion from 'const int' to 'int&&'" in a function called by a function called by a function you wrote.
Ten years of experience and I still stare at these errors like I'm trying to decode ancient hieroglyphics written by a caffeinated octopus.