Explanation
When making a post on a group wall, if an error occurs it is expected that an informative message is displayed to the user. However, only a generic “Unable to send post” message is displayed.
Examining the network request tab, specifically the request which errored, I saw a user-facing message within the JSON, which I suspect is what is meant to be shown in the red banner.
Reproduction
The easiest error to get is the too many posts error:
- Go to a group that has a group wall open (ideally one which you own or your friend’s - don’t spam random walls!)
- Send 4 messages to the group wall one after another.
- Observe the uninformative red banner which appears upon ‘posting’ the 4th message.
System / Browser
Testing was conducted in Google Chrome, on a PC running Windows 10.