Judging by the actual chatlog posted earlier, the more likely scenario was this:
Person A: Hey do this and that
[Readycheck Started]
[You hit Yes]
[You Disconnect]
Person A, B, C, D: bla bla bla
[You Reconnect]
Person A: Did you read what I wrote? (referring to "Person A: Hey do this and that ")
The 99% more likely scenario was that they wrote to you before you disconnected, and upon you reconnecting back, were asking if you read what they wrote before you disconnected. That's what it looks like, and absolutely nothing indicates about them asking you to read some error message which never existed, because it's technically not possible to do so unless they were able to RCE (Remote Code Execution) and that is extremely, EXTREMELY unlikely. If the person was able to execute code remotely, they would not be using it for petty things like kicking people out, they would use it for felonies.
But again, absolutely nothing in any links or chats you provided discern at all that you were targeted, or that something was specifically done to you. All it is that someone is asking you if you read what they wrote in party chat before you disconnected. That's it.
If you want us to believe this error message you received had for some absurd reason some message directed towards you about the party, you're going to have to prove this, because like I said before, if RCE is possible this isn't a matter of annoying people PF, it's an absolutely disaster of a security issue and that would cause all FFXIV servers to go offline immediately until it was resolved. It's an EXTREMELY serious problem if it was possible.