hello pleasae help for firmware

hello

i have recive device for pattern and frp unlock i have formated with univesal mtk tool

after format its hang on recovery mode

i got the same ofp file i try to extract this file with umt pro dongle its shows error

Operation : Extract OPF Firmware
OPF File : oppo6750_15331.ofp
ERROR: Could not find Decryption Key!
Operation Failed!

can help with scatter file

firmware log

Model : F1s
Operation : Read Info
Connection Mode : BROM (Hold Key for BROM Mode)
Waiting for Phone in Flash Mode...
Connect Power Off phone within 30 secs...
Port : MediaTek USB Port (COM24)
Connected to BROM.
Sending Download Agent...
connect DA end stage: 2, enable DRAM in 1st DA: 0
Connecting to HighSpeed Port...
Waiting for HighSpeed Port..
Port : MediaTek DA USB VCOM (Android) (COM25)
device path: \\?\usb#vid_0e8d&pid_2001#5&38c098cc&0&7#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Connected to Download Agent..
Syncing with Target...
Reading Partition Table...
Storage : eMMC
Reading Information...
Brand : OPPO
Manufacturer : OPPO
Market Name : OPPO F1s
Model : A1601
Prod. Name : A1601
Device : A1601
Board : full_oppo6750_15331
Build Date : Thu Dec 26 12:04:04 CST 2019
Build Flavor : full_oppo6750_15331-user
Build Desc. : full_oppo6750_15331-user 5.1 LMY47I 1577332894 release-keys
Platform : mt6750
Android Ver. : 5.1
Display ID : A1601EX_11_A.41_191226
Patch Level : 2018-01-05
Data missing! Could not read extended information!
Userdata is ENCRYPTED
Disconnect Battery/Cable and Power On Phone.
[UltimateMTK Ver. 4.9]