Maybe you don't know how to do something at work. Instead of asking the boss or seeking someone as a mentor, you might not want to show them your ignorance. So, you're depriving yourself of this learning and mentorship. All of these ways are ways that a fixed mindset will hold you back.
Important When someone endorses a fixed mindset, it can limit them, even if they're successful at the moment, because if they start struggling and tumbling, they can lose their confidence, but also, they may not create a growth mindset environment for others.