When one user spent her last invitation she gets an Infinte loop

Hello.

We are testing the module to use in a new project, and we have realize that when an user spents all her invitations , she gets an infinite loop in the last one.
Then she gets a white screen and if she reload the page it's say this:

    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.
    Sorry, you've reached the maximum number of invitations.

Thanks

Oskar