We’ve been using Rocket.Chat for a few years and a year or two ago we could no longer post photos from our phone. I always figured this was a bug but apparently not. I can’t find an issue.
I spent some time debugging this and when you click send on the phone, there is no HTTP request logged in the server after pressing send.
I thought maybe it was a permission issue, but I toggled permissions and the send button is gone when there is no permission.
As for server settings, there are no file type restrictions and file size is set to 300mb. I tried changing it to 1 byte and it would reject it so that setting seems to work.