jupyter labの拡張機能がインストールできません

jupyter labのextension managerを使用し拡張機能をインストールしようとすると

Build failed with 500, please run 'jupyter lab build' on the server for full output

とエラーが出たのでanaconda promptでjupyter lab buildと入力したら今度は

An error occured.
RuntimeError: JupyterLab failed to build
See the log file

と表示され、ログファイルを見ても原因がわかりません。

logfile
1[1/5] Validating package.json...
2[2/5] Resolving packages...
3success Already up-to-date.
4
5[LabBuildApp] > node C:\Users\inck7\anaconda3\lib\site-packages\jupyterlab\staging\yarn.js yarn-deduplicate -s fewer --fail
6[LabBuildApp] yarn run v1.21.1
7$ C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules.bin\yarn-deduplicate -s fewer --fail
8
9[LabBuildApp] > node C:\Users\inck7\anaconda3\lib\site-packages\jupyterlab\staging\yarn.js run build:prod:minimize
10[LabBuildApp] yarn run v1.21.1
11$ webpack --config webpack.prod.minimize.config.js 
12  modules by path /node_modules/13.3 MiB
13    cacheable modules 13.3 MiB 973 modules
14    3 modules
15  consume-shared-module modules 4.47 KiB
16    modules by path consume shared module (default)
17    modules by path consume shared module (default) 
18  provide-module modules 4.43 KiB 108 modules
19  modules by path
20
21WARNING in /node_modules/vega-lite/build/src/index.js
22Should not import the named export 'version' (reexported as 'version') from default-exporting module (only default export is available soon)
23
24ERROR resolving fallback for shared module @lckr/jupyterlab_variableinspector Module not found Error Can't resolve '@lckr/jupyterlab_variableinspector' in 'C:\Users\inck7\anaconda3\share\jupyter\lab\staging\build'
25resolve '@lckr/jupyterlab_variableinspector' in 'C:\Users\inck7\anaconda3\share\jupyter\lab\staging\build'
26  Parsed request is a module
27  using description file: C:\Users\inck7\anaconda3\share\jupyter\lab\staging\build\package.json relative path:
28    Field 'browser' doesn't contain a valid alias configuration
29    resolve as module
30      C:\Users\inck7\anaconda3\share\jupyter\lab\staging\build\node_modules doesn't exist or is not a directory
31      looking for modules in C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules
32        single file module
33          using description file: C:\Users\inck7\anaconda3\share\jupyter\lab\staging\package.json (relative path: ./node_modules/@lckr/jupyterlab_variableinspector)
34            no extension
35              Field 'browser' doesn't contain a valid alias configuration
36              C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector is not a file.js Field 'browser' doesn't contain a valid alias configuration
37              C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.js doesn't exist .json  Field 'browser' doesn't contain a valid alias configuration
38              C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.json doesn't exist.wasm  Field 'browser' doesn't contain a valid alias configuration
39              C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.wasm doesn't exist existing directory C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector
40          using description file:C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\package.json (relative path: .)
41            using description file: C:\Users\inck7\anaconda3\share\jupyter\lab\staging\package.json (relative path: ./node_modules/@lckr/jupyterlab_variableinspector)
42              no extension Field 'browser' doesn't contain a valid alias configuration
43                C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector is not a file .js Field 'browser' doesn't contain a valid alias configuration
44                C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.js doesn't exist.json Field 'browser' doesn't contain a valid alias configuration
45                C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.json doesn't exist .wasm Field 'browser' doesn't contain a valid alias configuration
46                C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.wasm doesn't exist as directory existing directory C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector
47                  using description file: C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\package.json (relative path: .)use ./lib/index.js from main in package.json
48                      using description file: C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\package.json (relative path: ./lib/index.js) no extension Field 'browser' doesn't contain a valid alias configuration
49                          31mC:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js doesn't js Field 'browser' doesn't contain a valid alias configuration
50                          C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js.js doesn't exist.json Field 'browser' doesn't contain a valid alias configuration
51                          C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js.json doesn't exist .wasm Field 'browser' doesn't contain a valid alias configuration
52                          C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js.wasm doesn't exist as directory
53                          C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js doesn't exist
54                    using path: C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index
55                      using description file: C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\package.json (relative path: ./index) no extension Field 'browser' doesn't contain a valid alias configuration
56                          C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index doesn't exist .js Field 'browser' doesn't contain a valid alias configuration
57                          C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index.js doesn't exist.json  Field 'browser' doesn't contain a valid alias configuration
58                          C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index.json doesn't exist .wasm  Field 'browser' doesn't contain a valid alias configuration
59                          C:\Users\inck7\anaconda3\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index.wasm doesn't exist
60      C:\Users\inck7\anaconda3\share\jupyter\lab\node_modules doesn't exist or is not a directory
61      C:\Users\inck7\anaconda3\share\jupyter\node_modules doesn't exist or is not a directory
62      C:\Users\inck7\anaconda3\share\node_modules doesn't exist or is not a directory
63      looking for modules in C:\Users\inck7\anaconda3\node_modules
64        single file module
65          No description file found in C:\Users\inck7\anaconda3\node_modules\@lckr or above
66          no extension
67            Field 'browser' doesn't contain a valid alias configuration
68            C:\Users\inck7\anaconda3\node_modules\@lckr\jupyterlab_variableinspector doesn't exist
69          .js Field 'browser' doesn't contain a valid alias configuration
70            C:\Users\inck7\anaconda3\node_modules\@lckr\jupyterlab_variableinspector.js doesn't exist
71          .json  Field 'browser' doesn't contain a valid alias configuration
72            C:\Users\inck7\anaconda3\node_modules\@lckr\jupyterlab_variableinspector.json doesn't exist
73          .wasm  Field 'browser' doesn't contain a valid alias configuration
74            C:\Users\inck7\anaconda3\node_modules\@lckr\jupyterlab_variableinspector.wasm doesn't exist
75       C:\Users\inck7\anaconda3\node_modules\@lckr\jupyterlab_variableinspector doesn't exist
76      C:\Users\inck7\node_modules doesn't exist or is not a directory
77     C:\Users\node_modules doesn't exist or is not a directory
78     C:\node_modules doesn't exist or is not a directory
79
80webpack 5.31.2 compiled with  error and  warning in 23978 ms