I tried 3 times to update the plugin for version 188.8.131.52
1) from the WPMU Dashboard - i just get error "unnown error" in a red Notification bar
2) via the link in the list of plugins in the admin site - i just get error "unnown error"
3) via checkbox and batch operation (to see the process page of plugin update)
And just there i get a error message, that could help:
Cannot copy file: coursepress/includes/external/tcpdf/fonts/dejavusansmonob.z
Seems this file is missing somehow in the download? At least - it breaks the update process.
Please advise what to do...