In an agile environment, when a team encounters a technical problem, it is essential to engage the team in a problem-solving session to collaboratively find a solution. This approach aligns with the agile principle of self-organizing teams that are empowered to address challenges and adapt their work accordingly. Organizing a retrospective could be beneficial, but it is typically done after a sprint is completed to reflect on what went well and what could be improved. In this case, addressing the problem promptly within the sprint is crucial to maintain the momentum and ensure the team can move forward without delay.
References: The answer is supported by agile methodologies that emphasize team collaboration and problem-solving within the sprint cycle. The PMBOK Guide also highlights the importance of the project manager facilitating problem-solving and empowering the team to find solutions1. Additionally, the Professional in Business Analysis materials suggest employing problem-solving techniques to address issues as they arise23.