Upload file not possible

Hello,
I can’t upload a 4mo file with Webgui or windows client.
I modify my PhP config file for max-size up to 5G.
In my log I have only :

Debug no app in context No cache entry found for /XxX/files/gallery.cnf (storage: home::XxX, internalPath: files/gallery.cnf) September 17, 2018 16:11:37
Debug cron Finished OCA\Files_Sharing\DeleteOrphanedSharesJob job with ID 5 in 0 seconds September 17, 2018 16:11:37
Debug DeleteOrphanedSharesJob 0 orphaned share(s) deleted September 17, 2018 16:11:37
Debug cron Run OCA\Files_Sharing\DeleteOrphanedSharesJob job with ID 5 September 17, 2018 16:11:37
Debug no app in context No cache entry found for /appdata_occpt1cmxo46/avatar/XxX/avatar.jpg (storage: local::/mnt/Owncloud/data/, internalPath: appdata_occpt1cmxo46/avatar/XxX/avatar.jpg) September 17, 2018 16:11:37
Debug no app in context No cache entry found for /appdata_occpt1cmxo46/css/icons/icons-vars.css (storage: local::/mnt/Owncloud/data/, internalPath: appdata_occpt1cmxo46/css/icons/icons-vars.css)