Bumping this back to the top...
I did some additional testing using my wife's iPhone 6S (IOS 11.0.3 with Seafile client v2.6.8). I went into Photos, clicked the share button, clicked "More" and enabled "Save to Seafile", and hit the Done button. I then went back to the menu and hit "Save to Seafile". The first time I tried it, it had me authenticate, select where to save, at which point there was a pop-up that said "Uploading (null)". It never completed or went away, so I canceled and tried again. The second time it said "Uploading.." with the filename of the picture after it, but again, never completed after about 20 minutes of waiting.
Is anyone else using this feature and experiencing these issues? I'm trying to determine if it is a configuration problem with my Seafile server (and/or network), a limitation of my Seafile v5.1.3 server that requires an upgrade to work, or if the feature simply isn't operational yet. If there are logs or other info I can provide, I'm happy to do so.