Means you haven't pre rooted the stock rom, so you are not able to boot to stock system. If you don't have a kernel for fixing that you will have to pre root stock rom before installing twrp.
it works like a charm both magisk module and the twrp method ....Ok
Use this to get RwizzROM
wizzROM a12 Creator for Samsung a125 Turn any stock or custom OneUI into a QwizzROM or RwizzROM Also see the Magisk module in post#2 OneUI 2.0 will become QwizzROM OneUI 3.1 will become RwizzROM Debloated ROM with Extras Extras: Battery...forum.xda-developers.com
You know, If you could please
No. I don't own a12.And have you tried useing samsung_multi_disabler 3.6 on this rom?
[Pie/10/11] [System-as-root] Multidisabler: disables encryption, Vaultkeeper, auto-flash of stock recovery, proca, wsm, cass, etc.The multi-disabler started life on the Exynos...forum.xda-developers.com