Need Help with decryption backup config.bin file "ZTE ZXHN H267N v1.1"

Question

hi i'm trying to decrypt config.bin file from new router I got from my company, I tried a tool found on github "https://github.com/mkst/zte-config-utility" I got this ERROR:

python3 examples/decode.py --key 'tHG@Ti&GVh@ql3XN' --serial 'ZTEFG7GL7B112171' config.bin config.xml
Traceback (most recent call last):
  File "examples/decode.py", line 41, in <module>
    main()
  File "examples/decode.py", line 36, in main
    payload_type = zcu.zte.read_payload_type(infile)
  File "/home/user/.local/lib/python3.8/site-packages/zcu-0.1.0-py3.8.egg/zcu/zte.py", line 51, in read_payload_type
  File "/home/user/.local/lib/python3.8/site-packages/zcu-0.1.0-py3.8.egg/zcu/zte.py", line 45, in read_payload
AssertionError

binwalk gives me:

binwalk -E -N config.bin

DECIMAL       HEXADECIMAL     ENTROPY
--------------------------------------------------------------------------------
0             0x0             Rising entropy edge (0.950362)
18432         0x4800          Falling entropy edge (0.617036)

binwalk -W config.bin

OFFSET      config.bin
--------------------------------------------------------------------------------
0x00000000  04 03 02 01 00 00 00 00 00 00 00 0F 5A 58 48 4E |............ZXHN|
0x00000010  20 48 32 36 37 4E 20 56 31 2E 31 01 02 03 04 00 |.H267N.V1.1.....|
0x00000020  00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
0x00000030  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
0x00000040  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
0x00000050  00 00 00 00 00 00 00 00 00 47 B0 00 00 47 C0 00 |.........G...G..|
0x00000060  00 00 00 70 B0 93 D8 95 41 0B 8B A6 26 7B 59 35 |...p....A...&{Y5|
0x00000070  44 77 FF 9C 74 B2 02 15 29 F9 28 EA 5A F2 C5 84 |Dw..t...).(.Z...|
0x00000080  66 B1 2C 3E 10 5A 76 AA 2D D1 9E 9D AA 6E 49 1E |f.,>.Zv.-....nI.|
0x00000090  5F A1 6D 0D 42 E0 6C E9 D9 84 81 23 99 5A B5 22 |_.m.B.l....#.Z."|
0x000000A0  09 BC 78 5A CB EF AF 4B D7 1E A2 40 D4 11 7F 7E |..xZ...K...@...~|
0x000000B0  EE EC DC E8 D7 CC 9C 8B EE BD 02 6C A7 BB F8 B6 |...........l....|
0x000000C0  76 01 2F 0A CD CE F4 B1 02 BF A9 C3 37 D1 3D 44 |v./.........7.=D|
0x000000D0  80 55 DD C9 DB 59 70 1C D9 9F DA 89 D6 04 14 66 |.U...Yp........f|
0x000000E0  AA 9B 77 AE 1D BB 0C C0 BF 2F F2 86 3D 3B E5 CA |..w....../..=;..|
0x000000F0  1E EF 25 2D 44 02 09 DE 6A BF 3A 91 56 65 58 6E |..%-D...j.:.VeXn|
0x00000100  B2 7B 5F 18 1F 18 90 3E 43 56 B8 9A 1A 5B 3A BC |.{_....>CV...[:.|
0x00000110  6E D0 5B 44 5F 2B 9E CC BC F4 12 8B 61 50 E4 C8 |n.[D_+......aP..|
0x00000120  1C 50 FF B9 2F 1E 34 83 57 63 72 45 5E E4 83 17 |.P../.4.WcrE^...|
0x00000130  8F ED 29 AC 0E 27 DF FD 30 C1 63 44 D2 35 2F E9 |..)..'..0.cD.5/.|
0x00000140  65 5B 6A AA 39 54 9D 5C 34 29 63 43 C6 1D 67 80 |e[j.9T.\4)cC..g.|
0x00000150  89 7B EB 08 A3 30 A9 67 A8 C0 38 EA B4 B1 7B 45 |.{...0.g..8...{E|
0x00000160  6D C5 3A A6 FC 90 52 05 20 62 E0 82 C8 A3 76 98 |m.:...R..b....v.|
0x00000170  D9 D8 7D B1 BE CC 1A B6 15 CA BB 85 5B 15 EE 1D |..}.........[...|

any idea guys to decrypt config.bin file