$ docusaurus build
Creating an optimized production build...
[info] [webpackbar] Compiling Client
[info] [webpackbar] Compiling Server
[success] [webpackbar] Client: Compiled successfully in 12.23s
[success] [webpackbar] Server: Compiled with some errors in 13.57s

(undefined) TypeError: Cannot convert undefined or null to object

    at Function.keys (<anonymous>)
TypeError: Cannot convert undefined or null to object
    at main:19364:12
    at Array.reduce (<anonymous>)
    at getBundles (main:19363:20)
    at serverEntry_render (main:35231:113)
(undefined) TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at main:19364:12
    at Array.reduce (<anonymous>)
    at getBundles (main:19363:20)
    at serverEntry_render (main:35231:113)
(undefined) TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at main:19364:12
    at Array.reduce (<anonymous>)
    at getBundles (main:19363:20)
    at serverEntry_render (main:35231:113)
(undefined) TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at main:19364:12
    at Array.reduce (<anonymous>)
    at getBundles (main:19363:20)
    at serverEntry_render (main:35231:113)
(undefined) TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at main:19364:12
    at Array.reduce (<anonymous>)
    at getBundles (main:19363:20)
    at serverEntry_render (main:35231:113)
Error: Failed to compile with errors.
    at /home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/@docusaurus/core/lib/commands/build.js:38:24
    at finalCallback (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/MultiCompiler.js:254:12)
    at /home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/MultiCompiler.js:277:6
    at done (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/neo-async/async.js:2931:13)
    at runCompilers (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/MultiCompiler.js:181:48)
    at /home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/MultiCompiler.js:188:7
    at /home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/MultiCompiler.js:270:7
    at finalCallback (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/Compiler.js:257:39)
    at /home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/Compiler.js:273:13
    at AsyncSeriesHook.eval [as callAsync] (eval at create (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:42:1)
    at AsyncSeriesHook.lazyCompileHook (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/tapable/lib/Hook.js:154:20)
    at onCompiled (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/Compiler.js:271:21)
    at /home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/Compiler.js:681:15
    at AsyncSeriesHook.eval [as callAsync] (eval at create (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:6:1)
    at AsyncSeriesHook.lazyCompileHook (/home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/tapable/lib/Hook.js:154:20)
    at /home/runner/work/docusaurus-issue/docusaurus-issue/node_modules/webpack/lib/Compiler.js:678:31
    at Function.keys (<anonymous>)
    at Array.reduce (<anonymous>)TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Array.reduce (<anonymous>)TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Array.reduce (<anonymous>)TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Array.reduce (<anonymous>)TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Array.reduce (<anonymous>)