A company is integrating its existing systems and there are known production issues. What should the project manager do?

The project manager's primary responsibility is to facilitate project progress and remove obstacles. Known production issues are significant impediments and risks to the project's success. Identifying and actively working to remove these impediments and mitigate associated risks directly addresses the problem, ensuring the project can move forward effectively. Ensuring the product owner reviews requirements is part of good agile practice but doesn't directly address existing production issues. Including acceptance criteria in the Definition of Done (DoD) is crucial for quality but is a proactive measure for future work, not a direct solution for current production problems. Reviewing quality control processes is a good practice for preventing future issues, but the immediate concern is resolving the current production problems.