Error posting message in vBulletin Support Forum

[apettel]

I wanted to give feedback on the 5.1.0 alpha 6 in this forum and got this message:

"An unexpected error was returned: 'Subscriptions'"

[Mark.B]

Yes I've been getting that too...it seems to be just that specific thread.
Not sure at this stage what's causing it, but I have mentioned the issue.

If you refresh the page, you should find the post has gone in ok anyhow.

[Wayne Luke]

At what step in the process did the error occur?

Does your post go through?

[Mark.B]

Wayne it happens while your're waiting for the post to submit. The post always seems to go through.
It just seems to be that specific thread (the 5.1.0 discussion thread)

[thaihung38]

I get the same problem when posting a reply, but for a specific account in its starter topic. (This account is the moderator of the channel). Another starter topics by other accounts work normally.

[bw_van_manen]

Did you find out what caused this error message? I get the same message on my forum now.