That's really weird. If you can post here you should be able to reply to that thread.
Can you post the message on this thread that you were going to add there? I'd like to see if it is just tied to that thread or related to the content in the message perhaps.
If still occurring we can take the date/time of attempting (if you can share what time you attempted) and pass the information over to the software vendor to have them investigate it.
Last night I was experiencing the same symptoms right after I created my account. This morning, it seems to have fixed itself.