Does anyone know why I get an error message ("Sorry, the group you requested was not found or you are not allow to access. Please check the URL for proper spelling and capitalization. If you're having trouble locating a destination on Diigo, try visiting the Diigo group home page.") when I click on the e-mail invite link to join the group?

I also know the name of the group, but can't find it with a search nor by browsing the list of groups recently added, probably because it has been set up as a private group, I guess.

Someone suggested that I try to change my username to my e-mail address, but that makes little sense to me since my e-mail is properly configured in my account info (and my receiving of group invites is proof enough?).

Appreciate any help on this. Thanks. RG