With so many offers on OhMyDosh! Sometimes a few old offers might slip through the cracks and still appear as available in the system but the Advertiser is no longer promoting their offer on OhMyDosh! (their loss!). However, this could also be due to anti-virus software blocking sites. First, try clearing your cookies (YUM!) before trying again as this often resolves the issue.
If clearing the cookies doesn't help, then please try logging in on a different device to see if you have the same problem. If that doesn't work, please submit a ticket by clicking the link below.
If clearing the cookies does work. Have a cookie. You deserve it.