Hi!
This is a known issue when updating to 10.0.3 https://github.com/owncloud/updater/issues/436
10.0.3 already contains a fix for that.
You can extract CHANGELOG.md from 10.0.3.zip package
https://download.owncloud.org/community/owncloud-10.0.3.zip
unzip -l owncloud-10.0.3.zip 'owncloud/CHANGELOG.md'
Archive: owncloud-10.0.3.zip
Length Date Time Name
--------- ---------- ----- ----
25213 2017-09-15 10:43 owncloud/CHANGELOG.md
--------- -------
25213 1 file