Has anyone discovered a network error when trying to post or contribute to discussion?

I have created many courses. The latest one however, I find that I can no longer take part in discussions in any way. I am the owner of the course and other teachers contributing have been able to work normally. I get a network error. I can still add posts as normal.

I assume since you are posting in the iTunes U for iOS forum that you are having issues with the IOS version of the app. What is the exact error message?
Can you participate in a course's discussion from iTunes U's Course Manager (https://itunesu.itunes.apple.com/coursemanager/)?

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