blenderのpythonにライブラリをインストールできない(BlendArMocap)

BlendArMocap(参考urlは最後にはっております)というアドオンをblenderで使いたいです

これのアドオンをblenderから有効化するときに、edit>preferences>addons でBlendArMocapのチェックボックスに印をいれるとその下にpreferencesが表れて、install dependencies　と書かれたボタンを押してひつようなpythonライブラリを自動でインストールしてくれるらしいんですけど、うまくいきません。

blender
1Read prefs: C:\Users\deded\AppData\Roaming\Blender Foundation\Blender\2.90\config\userpref.blend
2found bundled python: C:\Program Files\Blender Foundation\Blender 2.90\2.90\python
3DEPENDENCIES INSTALLED: False
4
5
6REGISTERING BLENDARMOCAP
7TRY ACCESS INSTALLED DEPENDENCIES
8Dependency(module='mediapipe', package=None, name=None)
9REGISTRATION FAILED: MODULE NOT FOUND
10accessing pip installer
11Blender 2.90.0
12        build date: 2020-08-31
13        build time: 10:00:13
14        build commit date: 2020-08-31
15        build commit time: 11:26
16        build hash: 0330d1af29c0
17        build platform: Windows
18        build type: Release
19        build c flags: /W3 /w34062 /w34115 /w34189 /wd4018 /wd4146 /wd4065 /wd4127 /wd4181 /wd4200 /wd4244 /wd4267 /wd4305 /wd4800 /wd4828 /wd4996 /wd4661 /we4013 /we4133 /we4431 /w35038 /DWIN32 /D_WINDOWS /W3 /nologo /J /Gd /MP /bigobj -openmp
20        build c++ flags: /W3 /w34062 /w34115 /w34189 /wd4018 /wd4146 /wd4065 /wd4127 /wd4181 /wd4200 /wd4244 /wd4267 /wd4305 /wd4800 /wd4828 /wd4996 /wd4661 /we4013 /we4133 /we4431 /w35038 /DWIN32 /D_WINDOWS /W3 /GR /EHsc /nologo /J /Gd /MP /EHsc /bigobj /permissive- /Zc:twoPhase- -openmp /std:c++17
21        build link flags: /MACHINE:X64  /SUBSYSTEM:CONSOLE /STACK:2097152 /ignore:4049 /ignore:4217 /ignore:4221
22        build system: CMake
23Error: Not freed memory blocks: 371, total unfreed memory 0.135880 MB
24Try to install: mediapipe 1
25Read prefs: C:\Users\deded\AppData\Roaming\Blender Foundation\Blender\2.90\config\userpref.blend
26found bundled python: C:\Program Files\Blender Foundation\Blender 2.90\2.90\python
27DEPENDENCIES INSTALLED: False
28
29
30REGISTERING BLENDARMOCAP
31TRY ACCESS INSTALLED DEPENDENCIES
32Dependency(module='mediapipe', package=None, name=None)
33REGISTRATION FAILED: MODULE NOT FOUND
34unknown argument, loading as file: -m
35繧ｨ繝ｩ繝ｼ: 繝輔ぃ繧､繝ｫ縲慶:\Program Files\Blender Foundation\Blender 2.90\-m縲阪′隱ｭ繧√∪縺帙ｓ: No such file or directory
36Error: argument has no '.blend' file extension, not using as new file, exiting! c:\Program Files\Blender Foundation\Blender 2.90\-m
37Saved session recovery to 'C:\Users\deded\AppData\Local\Temp\quit.blend'
38
39Blender quit
40INSTALL USING SUPER USER
41Read prefs: C:\Users\deded\AppData\Roaming\Blender Foundation\Blender\2.90\config\userpref.blend
42found bundled python: C:\Program Files\Blender Foundation\Blender 2.90\2.90\python
43DEPENDENCIES INSTALLED: False
44
45
46REGISTERING BLENDARMOCAP
47TRY ACCESS INSTALLED DEPENDENCIES
48Dependency(module='mediapipe', package=None, name=None)
49REGISTRATION FAILED: MODULE NOT FOUND
50unknown argument, loading as file: -m
51繧ｨ繝ｩ繝ｼ: 繝輔ぃ繧､繝ｫ縲慶:\Program Files\Blender Foundation\Blender 2.90\-m縲阪′隱ｭ繧√∪縺帙ｓ: No such file or directory
52Error: argument has no '.blend' file extension, not using as new file, exiting! c:\Program Files\Blender Foundation\Blender 2.90\-m
53Saved session recovery to 'C:\Users\deded\AppData\Local\Temp\quit.blend'
54
55Blender quit
56

おそらくプログラムを動かすためにpythonの必要なライブラリをpipでinstallしているようなんですが、うまいこと行っていません。
OpenCVとmediapipeというのが必要みたいです。
手動で両方ともインストールしてみたんですが、うまくいきませんでした。
blender側のコンソールでimport mediapipeとするとgoogleというモジュールがないぞとエラーが出ます。

console
1Traceback (most recent call last):
2  File "<blender_console>", line 1, in <module>
3  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\site-packages\mediapipe\__init__.py", line 16, in <module>
4    from mediapipe.python import *
5  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\site-packages\mediapipe\python\__init__.py", line 27, in <module>
6    import mediapipe.python.packet_creator
7  File "C:\Program Files\Blender Foundation\Blender 2.90\2.90\python\lib\site-packages\mediapipe\python\packet_creator.py", line 22, in <module>
8    from google.protobuf import message
9ModuleNotFoundError: No module named 'google'