Cant see the message on both Mac and iPhone

[mavericks7913]

All I can see is that symbol. He sent a message but I have no idea what to do. Any idea?

 

[Banglazed]

It’s possible a blank text?

 

[mavericks7913]

It’s possible a blank text?

No it's not. On the list, I see some messages.

 

[scott:mac]

No it's not. On the list, I see some messages.

Sign out of Messages in System Preferences, restart and log back in

 

[mavericks7913]

Sign out of Messages in System Preferences, restart and log back in

Sign out which one?