Button in SharePoint list to trigger Microsoft Flow does not work

[JPC]

Hello, 

I would like to allow users to add files on an SharePoint list item by using the Flow button. 

This button works for SharePoint site members. 

But for those who are only autorized to read this Sharepoint list of the site, no popup is coming:

I have added them as Run-only users, but no popup is coming anyhow. 

Can someone help indicate what is missing? Should it be because they only can acces the list and nothing more? 

Thanks, 

[ScottShearer · Accepted solution]

@JPC :

My understanding is that the user attempting to run the Flow still must have at least contribute access to the list in order to run a for a selected item Flow even if the user or the list has been added as a run-only user.

I this answers your question, please mark your post as Solved.

Scott