Its not OK to be wrong.

If I am wrong
Mother will get upset
And stop loving me
And then I will die.

So, for many, the fear of being wrong is tied up with dying. Not that the don't have any adventurous spirit, where all they need is some encouragement.
Realize that this is where this fear of failure stems from, and know that it takes time to heal pathways that you laid down when you were somewhere between 2 and 5.

Inner child work usually helps to remove this fear.