Sharing a Stessa Account

My property manager has a Stessa account and I have a Stessa account. He has sent me a link to his Stessa account to show me the transactions that he has handled on my properties.

However, If I open his link in my normal browser, I get my own account. When I try it in a different browser, I get a new, empty account with no properties and no transactions.

When I open that link on my phone with the Stessa app, I get my own account with no new information.

How can I see what he has done?