I do not a login screen. When I select the OneNote icon in WordPress, I get a pop up window that states:
We’re unable to complete your request
Microsoft account is experiencing technical problems. Please try again later.
I have placed the appropriate client IDs in their place. I have it linked in my accounts in onenote and my onenote is linked to my onedrive. The site I am using the plug in is password protected. Does that make a difference?