Morning,
I tried to reply to a message a ahort while ago and was unable to. I then got a popup to contact an administrator im guessing to report issue.
I was using an ipad if that helpa resolve issue.
Phone is working fine
If it's the message about an invalid link or something like that and contact an administrator to report issue try signing off, clearing your cookies and signing back on. I got that the other day and marrone helped me through it.
He said sometimes you gotta sign out and then back in. I did and cleared my cookies and problem was solved.