Are you referring to an invitation to join an agency? If the agency is experiencing any problems please ask the agency owner to reach out to us here or to our Customer Support. Thank you.
I'm having the same issue. They have sent it to a couple of times already while I was chatting with them. Every time I click on the notification regarding the invitation the page just refreshes.
Could you please clear your cache and cookies or log in with another browser to check if you are still experiencing the same issue? Please let us know if need our further assistance.