The same thing just happened to me today as to you, Alicia Rose, and my system is similar to yours. So thanks to you for posting about it and to Asyn for that last piece of advice: disabling HTTPS scanning in the Web Shield worked for me.
I appreciate the advice of the specialists on this forum so much. You help me keep my antiquated system running; and there's a sense of accomplishment when a workaround succeeds, one that isn't there when I just pay someone to do it for me.