Whenever I try to reply to a message - whether replying to my own message, or replying to a response that someone has posted to my message - I always get this error:
Your content could not be saved due to an error. You may have been logged out. If this problem persists please contact your system administrator. Click here to refresh this page.
I *am* logged in, but even if I log out and then log in again, the problem still occurs. I usually use a VPN and thought perhaps that was an issue, because some websites blacklist traffic from known VPNs, but even after I disconnect from the VPN, log out, and log back in, I still get this error.