Undefined array key "previews" at /var/www/nextcloud/apps/previewgenerator/lib/Command/Generate.php#160

[srijansaxena11]

I am getting the above error message in my Nextcloud logs every 10 minutes.

[PHP] Error: Undefined array key "previews" at /var/www/nextcloud/apps/previewgenerator/lib/Command/Generate.php#160

The error is pointing to this line:

[st3iny]

Which version of Nextcloud are you running?

[srijansaxena11]

Which version of Nextcloud are you running?

It's latest stable 28.0.4. I am happy to provide any other details if required and/or try anything to see if that resolves the issue.

[srijansaxena11]

Which version of Nextcloud are you running?

What other details can I provide to debug/resolve it?

[joshtrichards]

It's related to your External Storage configuration. It seems like one of your mounts is lacking the preview field in its config (which is a little weird).

Please send the output of occ files_external:list --output=json_pretty.

[srijansaxena11]

It's related to your External Storage configuration. It seems like one of your mounts is lacking the preview field in its config (which is a little weird).

Please send the output of occ files_external:list --output=json_pretty.

Hi. Please find it below:

[ { "mount_id": 4, "mount_point": "\/var\/lib\/media", "storage": "\\OC\\Files\\Storage\\Local", "authentication_type": "null::null", "configuration": { "datadir": "\/var\/lib\/media" }, "options": { "enable_sharing": false }, "applicable_users": [], "applicable_groups": [] }, { "mount_id": 5, "mount_point": "\/External_Storage", "storage": "\\OC\\Files\\Storage\\Local", "authentication_type": "null::null", "configuration": { "datadir": "\/var\/lib\/media" }, "options": { "enable_sharing": false }, "applicable_users": [], "applicable_groups": [] } ]