It can mean the upcoming difficulties. The dream of a barrier must be read literally, it means an obstacle in our way or emotional blockade.
see: unexpected difficulties
break it: something will bring good results
remove it: you will find a way out of the difficult situation, solve a problem; be brave and do not be afraid of taking risk
jump over it: you have a problem to overcome, you worry that cannot handle it; stay calm and do not act rashly, but gradually, and you will manage overcome it
very high, difficult to cross: a lot of optimism in some case.
a barrier, which protects us: we build a wall around us, that separates us from other
see a barrier between you and someone close to you: an obstacle that is insurmountable, you need to think about what is the reason