In your ownCloud is an additional external storage configured. External storage lies on systems outside of the ownCloud server and can be accessed through a multitude of different protocols.
For some reason your ownCloud system can’t reach this external storage any more.
Check the external storage settings, but be aware that there are two places for this:
- in the admin settings
- in the personal settings
For the external storage configuration to be available in the personal settings a checkbox has to be set in the admin storage settings.
Once you have the settings of how your external storage is configured go through everything to make sure ownCloud can access it:
- Protocol support through additional libraries
- Correct paths
A look in the ownCloud logs should also help.