Hey,
nice that you have found a possibility to work around this message. If i’m understanding both topics correctly there are two things which should be configured so that those messages are not showing up again in the future:
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Configuring / setup cron based background jobs: https://doc.owncloud.com/server/10.1/admin_manual/configuration/server/background_jobs_configuration.html#cron
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Configuring / setup redis for file locking: https://doc.owncloud.com/server/10.1/admin_manual/configuration/files/files_locking_transactional.html