It’s okay for teams to struggle. From struggle comes learning. And teams that have gone through difficult moments build resilience and a deep sense of community. The coach’s role therefore is not to prevent foreseeable problems, but to support teams in solving them (and later help them reflect on how they've grown in the process).
The coach’s role is to let teams make their own choices, even if (s)he believes (s)he knows a better solution.
The coach supports the team mostly by asking insightful questions and mirroring what is seen. (S)He helps teams frame issues and solutions in light of the Team’s purpose.