Found out the issue.
This thread https://quantnet.com//threads/columbia-mfe-vs-stanford-ms-mcf-vs-cmu-mscf.16198/ has thread type Poll.
It does not have a poll so you see XF\ThreadType\AbstractHandler::isPostVotingSupported(): in the error message.
This thread https://quantnet.com//threads/columbia-mfe-vs-stanford-ms-mcf-vs-cmu-mscf.16198/ has thread type Poll.
It does not have a poll so you see XF\ThreadType\AbstractHandler::isPostVotingSupported(): in the error message.