Nc-previews is run even though it is not enabled

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1

Running NC 19.0.2.2 but this issue is in NC 18 too.
For my setup, nc-previews-auto is not active but I got an email every other day or so from nc-previews at 2 AM.
What triggers nc-previews to start even though nc-previews-auto is not active?
Is that a fix for the permission error the email complains about?

Sender of the email is Cron /usr/local/bin/nc-previews

Body of the email
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00 In Folder.php line 165:
2020-09-08T09:00:04+00:00 In Folder.php line 165:
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00 [OCP\Files\NotPermittedException]
2020-09-08T09:00:04+00:00 [OCP\Files\NotPermittedException]
2020-09-08T09:00:04+00:00 Could not create folder
2020-09-08T09:00:04+00:00 Could not create folder
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00 Exception trace:
2020-09-08T09:00:04+00:00 Exception trace:
2020-09-08T09:00:04+00:00 at /var/www/nextcloud/lib/private/Files/Node/Folder.php:165
2020-09-08T09:00:04+00:00 at /var/www/nextcloud/lib/private/Files/Node/Folder.php:165
2020-09-08T09:00:04+00:00 OC\Files\Node\Folder->newFolder() at /var/www/nextcloud/lib/private/Files/AppData/AppData.php:157
2020-09-08T09:00:04+00:00 OC\Files\Node\Folder->newFolder() at /var/www/nextcloud/lib/private/Files/AppData/AppData.php:157
2020-09-08T09:00:04+00:00 OC\Files\AppData\AppData->newFolder() at /var/www/nextcloud/lib/private/Preview/Storage/Root.php:58
2020-09-08T09:00:04+00:00 OC\Files\AppData\AppData->newFolder() at /var/www/nextcloud/lib/private/Preview/Storage/Root.php:58
2020-09-08T09:00:04+00:00 OC\Preview\Storage\Root->newFolder() at /var/www/nextcloud/lib/private/Preview/Generator.php:468
2020-09-08T09:00:04+00:00 OC\Preview\Storage\Root->newFolder() at /var/www/nextcloud/lib/private/Preview/Generator.php:468
2020-09-08T09:00:04+00:00 OC\Preview\Generator->getPreviewFolder() at /var/www/nextcloud/lib/private/Preview/Generator.php:133
2020-09-08T09:00:04+00:00 OC\Preview\Generator->getPreviewFolder() at /var/www/nextcloud/lib/private/Preview/Generator.php:133
2020-09-08T09:00:04+00:00 OC\Preview\Generator->generatePreviews() at /var/www/nextcloud/lib/private/Preview/Generator.php:107
2020-09-08T09:00:04+00:00 OC\Preview\Generator->generatePreviews() at /var/www/nextcloud/lib/private/Preview/Generator.php:107
2020-09-08T09:00:04+00:00 OC\Preview\Generator->getPreview() at /var/www/nextcloud/lib/private/PreviewManager.php:190
2020-09-08T09:00:04+00:00 OC\Preview\Generator->getPreview() at /var/www/nextcloud/lib/private/PreviewManager.php:190
2020-09-08T09:00:04+00:00 OC\PreviewManager->getPreview() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:205
2020-09-08T09:00:04+00:00 OC\PreviewManager->getPreview() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:205
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->processFile() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:193
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->processFile() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:193
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->processRow() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:164
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->processRow() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:164
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->startProcessing() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:132
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->startProcessing() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:132
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->execute() at /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php:255
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->execute() at /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php:255
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Command\Command->run() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:1012
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Command\Command->run() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:1012
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->doRunCommand() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:272
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->doRunCommand() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:272
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->doRun() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:148
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->doRun() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:148
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->run() at /var/www/nextcloud/lib/private/Console/Application.php:215
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->run() at /var/www/nextcloud/lib/private/Console/Application.php:215
2020-09-08T09:00:04+00:00 OC\Console\Application->run() at /var/www/nextcloud/console.php:100
2020-09-08T09:00:04+00:00 OC\Console\Application->run() at /var/www/nextcloud/console.php:100
2020-09-08T09:00:04+00:00 require_once() at /var/www/nextcloud/occ:11
2020-09-08T09:00:04+00:00 require_once() at /var/www/nextcloud/occ:11
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00 preview:pre-generate
2020-09-08T09:00:04+00:00 preview:pre-generate
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
Running NC 19.0.2.2 but this issue is in NC 18 too.
For my setup, nc-previews-auto is not active but I got an email every other day or so from nc-previews at 2 AM.

Sender of the email is Cron /usr/local/bin/nc-previews

Body of the email
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00 In Folder.php line 165:
2020-09-08T09:00:04+00:00 In Folder.php line 165:
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00 [OCP\Files\NotPermittedException]
2020-09-08T09:00:04+00:00 [OCP\Files\NotPermittedException]
2020-09-08T09:00:04+00:00 Could not create folder
2020-09-08T09:00:04+00:00 Could not create folder
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00 Exception trace:
2020-09-08T09:00:04+00:00 Exception trace:
2020-09-08T09:00:04+00:00 at /var/www/nextcloud/lib/private/Files/Node/Folder.php:165
2020-09-08T09:00:04+00:00 at /var/www/nextcloud/lib/private/Files/Node/Folder.php:165
2020-09-08T09:00:04+00:00 OC\Files\Node\Folder->newFolder() at /var/www/nextcloud/lib/private/Files/AppData/AppData.php:157
2020-09-08T09:00:04+00:00 OC\Files\Node\Folder->newFolder() at /var/www/nextcloud/lib/private/Files/AppData/AppData.php:157
2020-09-08T09:00:04+00:00 OC\Files\AppData\AppData->newFolder() at /var/www/nextcloud/lib/private/Preview/Storage/Root.php:58
2020-09-08T09:00:04+00:00 OC\Files\AppData\AppData->newFolder() at /var/www/nextcloud/lib/private/Preview/Storage/Root.php:58
2020-09-08T09:00:04+00:00 OC\Preview\Storage\Root->newFolder() at /var/www/nextcloud/lib/private/Preview/Generator.php:468
2020-09-08T09:00:04+00:00 OC\Preview\Storage\Root->newFolder() at /var/www/nextcloud/lib/private/Preview/Generator.php:468
2020-09-08T09:00:04+00:00 OC\Preview\Generator->getPreviewFolder() at /var/www/nextcloud/lib/private/Preview/Generator.php:133
2020-09-08T09:00:04+00:00 OC\Preview\Generator->getPreviewFolder() at /var/www/nextcloud/lib/private/Preview/Generator.php:133
2020-09-08T09:00:04+00:00 OC\Preview\Generator->generatePreviews() at /var/www/nextcloud/lib/private/Preview/Generator.php:107
2020-09-08T09:00:04+00:00 OC\Preview\Generator->generatePreviews() at /var/www/nextcloud/lib/private/Preview/Generator.php:107
2020-09-08T09:00:04+00:00 OC\Preview\Generator->getPreview() at /var/www/nextcloud/lib/private/PreviewManager.php:190
2020-09-08T09:00:04+00:00 OC\Preview\Generator->getPreview() at /var/www/nextcloud/lib/private/PreviewManager.php:190
2020-09-08T09:00:04+00:00 OC\PreviewManager->getPreview() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:205
2020-09-08T09:00:04+00:00 OC\PreviewManager->getPreview() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:205
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->processFile() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:193
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->processFile() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:193
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->processRow() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:164
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->processRow() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:164
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->startProcessing() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:132
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->startProcessing() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:132
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->execute() at /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php:255
2020-09-08T09:00:04+00:00 OCA\PreviewGenerator\Command\PreGenerate->execute() at /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php:255
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Command\Command->run() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:1012
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Command\Command->run() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:1012
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->doRunCommand() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:272
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->doRunCommand() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:272
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->doRun() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:148
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->doRun() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:148
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->run() at /var/www/nextcloud/lib/private/Console/Application.php:215
2020-09-08T09:00:04+00:00 Symfony\Component\Console\Application->run() at /var/www/nextcloud/lib/private/Console/Application.php:215
2020-09-08T09:00:04+00:00 OC\Console\Application->run() at /var/www/nextcloud/console.php:100
2020-09-08T09:00:04+00:00 OC\Console\Application->run() at /var/www/nextcloud/console.php:100
2020-09-08T09:00:04+00:00 require_once() at /var/www/nextcloud/occ:11
2020-09-08T09:00:04+00:00 require_once() at /var/www/nextcloud/occ:11
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00 preview:pre-generate
2020-09-08T09:00:04+00:00 preview:pre-generate
2020-09-08T09:00:04+00:00
2020-09-08T09:00:04+00:00