After upgrading from 9.1.4 to 1.9.5, the installed bookmarks app is no longer available.
The app directory mentions:
Bookmarks 0.9.0 by owncloud (AGPL-licensed) (Approved), which cannot be enabled.
Client error response [url] https://apps.owncloud.com/CONTENT/content-files/174834-jj%3Cimg%20src= [status code] 404 [reason phrase] Not Found
Any idea, what could be wrong?