upgrade 2.11.1 to 2.12.0 - dosen't work backup option

[Maystero14]

Hello Guys

Could someone please check if the backup function still works after updating Part-DB to version 2.12.0? It stopped working in my instance. It was working fine before the update, as I had manually created a backup. After updating to the latest version, the result is what you see in the animation below. I should add that downgrading back to version 2.11.1 restores the backup functionality.

backup_fail.mp4

log from docker:

- -  26/May/2026:19:04:39 +0000 "POST /index.php" 302
192.168.88.144 - - [26/May/2026:19:04:39 +0000] "POST /en/system/update-manager/backup HTTP/1.1" 302 788 "http://192.168.88.44/en/system/update-manager" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0"
- -  26/May/2026:19:04:40 +0000 "GET /index.php" 200
192.168.88.144 - - [26/May/2026:19:04:40 +0000] "GET /en/system/update-manager HTTP/1.1" 200 12365 "http://192.168.88.44/en/system/update-manager" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0"

[FixitNOW982]

Same here. WSL2 debian with Docker env.