So, installing Team Explorer is the correct answer as there are dependencies required by the add-in that are not normally available with a base install of Windows. Team Explorer in lieu of the full flagship Visual Studio, which most stakeholders do not need. Team Explorer requires only "Stakeholder" permissions normally to access at a Azure DevOps limited, basic access level... but a CAL really depends on how you use the queries and underlying data. Normally this is not an issue because such users already have the sufficient access granted via Azure DevOps anyways.