I was just searching for an MP3 player app for nextcloud and found this here https://apps.nextcloud.com/apps/audioplayer. Somewhere in the manual (https://github.com/rello/audioplayer/wiki/installation-instructions) of that app I read that you can install it via the App Store within your nextcloud instance. Interestingly I did not find the app. What is going wrong? Misunderstanding on my side or a technical problem?