Me too, encountered today, first time I have tried to upload with the app in a while.
Worked ok until I tried to upload the photo.
I went away to desktop site to post it – fine.
Now the mobile app will not sync to show the new post. I ended the task, then restarted the app. It still will not sync, same error code. It now shows a blank post at the top of the list of published posts.
The app is up to date, version 7.0.
