Error Message when trying to edit an activity with a new participant

I get error messages when I try to edit existing activities in internet advancement. Specifically adding new people to the activity. A good example is I created a new campout and saved it before I added any attendees. Force of habit from other programs. When I go back to add people, I get an error message and the attendee is not added. This happens on all the activities I try to edit. Is there a work around? This has happened in Chrome and Safari. Anyone have a work around. I am a Key 3 delegate so I should have all the access I need. I noticed some people having the same is a month or so ago. Any work arounds?