Soft disable uploads doesn't work at some wikis.
Some wikis have no '+' prefix before a dbname in 'groupOverrides' at InitialiseSettings.php :
'[bnwikisource](https://bn.wikisource.org/wiki/Special:Listgrouprights?uselang=en)', '[guwiki](https://gu.wikipedia.org/wiki/Special:Listgrouprights?uselang=en)', '[newiki](https://ne.wikipedia.org/wiki/Special:Listgrouprights?uselang=en)', '[pswiki](https://ps.wikipedia.org/wiki/Special:Listgrouprights?uselang=en)', '[trwikiquote](https://tr.wikiquote.org/wiki/Special:Listgrouprights?uselang=en)', '[wuuwiki](https://wuu.wikipedia.org/wiki/Special:Listgrouprights?uselang=en)'
(Note: '[ladwiki](https://lad.wikipedia.org/wiki/Special:Listgrouprights?uselang=en)' is too. but this wiki is manually disabled by T145090)
It means those wikis are not inherit permissions from 'commonsuploads' set.
For this, those wikis can be use file upload function by autoconfirmed users.
I found this in deploying https://gerrit.wikimedia.org/r/#/c/406256/ (T185720).