Boot into recovery. Go to Wipe > Advanced Wipe . Select: Dalvik, Cache, System, Data. Do not wipe Internal Storage (or you'll lose the ROM zip).
You need a recovery built specifically for the exclusive ROM. Download the TWRP_Nokia32_Exclusive.img . Flash it using: fastboot flash recovery twrp_filename.img nokia 32 custom rom exclusive
, the custom ROM scene has breathed new life into this budget device, transforming it from a "sluggish" budget phone into a modern software experience. Boot into recovery