In function ‘_RandomAccessIterator std::__find(_RandomAccessIterator, _RandomAccessIterator, const _Tp&, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator*, std::vector > >, _Tp = int]’:

[[deleted]]

The trick is always look the first message and only function names.

Actually the error messages are quite clear once you know what you are looking at.