In a hybrid project the testing backlog has grown and become a bottleneck. The team found a tool that could resolve it and informed the project manager. What should the project manager do next?

The project manager should arrange training for team members on the tool because the team has identified a solution to a bottleneck. Providing training empowers the team to implement the solution, directly addressing the testing backlog and improving project flow. This aligns with a project manager's role in facilitating team problem-solving and removing impediments. Escalating to the product owner is premature since the team has already found a potential solution; the product owner's focus is typically on product value and prioritization, not operational bottlenecks unless they impact scope or schedule significantly. Reducing the testing scope is a drastic measure that could compromise quality and is not the first step when a solution is available. Adding developers might not resolve a testing bottleneck if the issue is with the testing process or tools, not a lack of development capacity.