Effective problem solving is important at work because it increases productivity and morale. The ability to find quick solutions to difficult problems is what separates people who are successful from those who struggle in life and in their careers. The first step is realizing that there is a problem. This is a major obstacle for some people because they deny that the issue even exists. There are various reasons for this. They could be worried about the consequences, so they refuse to accept that there is anything wrong. They might try to avoid it by blaming somebody else, which only stalls the problem-solving process. Once people accept that there really is a problem, finding a solution is always much easier.
The next step is for everyone to think about what they might have done to cause the problem and what they can do to fix it. Denying responsibility is an obstacle that needs to be overcome in order to have any hopes of solving the issue. Take some time to reflect before placing blame. Realize and accept that mistakes are made. The real problem is not being able to work together and find a solution. More confidence in your co-workers and less insecurity will reduce the tendency to be defensive. We can all be better at problem-solving if we remember that there is usually more than one reason for an issue at work and often more than one solution.