Under settings, go to installed apps, then go to the backup app and clear it's cache. Then reboot your device and try the local backup process.
Sent from my Redmi Note 4X using Tapatalk
Downloaded from home desktop and flashed via TWRP with dirty wipe on my Redmi Note 4 (mido).
Noticed nice minor changes (see screenshots below). Not sure about OTA but I'm happy with this update.
Many thanks to the xiaomi.eu team.
The board name for your device is nikel and the ROM name is HMNote4:cool:
The link of the latest stable ROM is https://sourceforge.net/projects/xiaomi-eu-multilang-miui-roms/files/xiaomi.eu/MIUI-STABLE-RELEASES/MIUIv8.5/xiaomi.eu_multi_HMNote4_V8.5.2.0.MBFCNED_v8-6.0.zip/download