Reacted with to cosmicvoyager’s post in the thread OMV 5.x MergerFS & Sqlite3 (Plex, Homessistant) : Disk I/O error.Reaction (Post)Ok so I found a fix, in case someone encounters the same issue.
From the GitHub page of mergerfs
direct_iois deprecated and has been replaced by
cache.files. The solution was to remove
cache.files=offfrom the mergerfs options in the OMV GUI.