A user deleted the “*.part” from the ignore list in the client. Syncing these files fail with an error message
Cannot modify header information - headers already sent by (output started at /data/nextcloud_19/3rdparty/sabre/http/lib/Sapi.php:132) at /data/nextcloud_19/apps/dav/lib/Connector/Sabre/File.php#683
filesize(): stat failed for /[filepath and name].part at /data/nextcloud_19/lib/private/Files/Storage/Local.php#224
in the log and a suspicious message (got 204 instead of 201) in client.
Of course, *.part is internally used for uploading files with multiple chunks.
Is this a client issue, should the client gray out the *.part line in the Ignore list to prohibit removing, or is this a server issue and uploading of these files should work ?