Few of the biggest fear of employees are getting fired, embarrassment, underperformance, rejection, isolation, communication.
I had a problem with communication when I joined my first company. I would communicate with the manager and a teammate of mine. I had a casual conversation with other teammates if required or when needed help. I overcame the problem by taking the initiative to talk to colleagues whenever I found the time. Similarly, many employees fear a lot more problems in their career. For example - underperformance, when team members performance is evaluated after certain time and being last would feel discouraged and lose confidence at the same time would take it as a challenge to overcome it.