In version 2.17, when you click on a photo in the gallery and press the share button to send it to a Mattermost channel, there is no response. (However, selecting and attaching a file from the gallery within the channel is possible.)
server Ver. (9.7.3 or 9.9.0) both App Ver 2.17 both issue.
Please review and improve it for the next version.
Thank you.