what does this error message signify?
Exception: OC\Files\Storage\Local::calculateEtag(): Argument #2 ($stat) must be of type array, bool given, called in /var/www/nextcloud/lib/private/Files/Storage/Local.php on line 505 in file ‘/var/www/nextcloud/lib/private/Files/Storage/Local.php’ line 508
Thanks for enlightments 
Ben
An error occured because the data provided to an internal Nextcloud function isn’t of the type expected. The reason might be that a required field hasn’t been filled or the system is unable to collect the data because of insufficient access rights, etc., etc.
Hi j-ed,
thank you very much
Ben