I am having the same issue as the one who started this thread, i cant stay longed in, and it keeps telling me, that my session has expired. I am using Firefox, and i am guessing it is the newest one out there *shrugs*
If you use Firefox and have cleared your cache and are sure your browser is set to allow cookies for the Combine, I would advise posting your handle in the Questions for the Admin forum along with a description of the problem and the steps you have tried so that an admin can look into it.
Can't see this sig or sometimes other images? Chrome now default blocks mixed content on secure sites like SWC. Go to chrome://settings/content/insecureContent and add www.swcombine.com to the Allow list. If you want. I'm not your dad or whatever.