Cannot find map even though it was generated

[MarcinMoskala]

In project:

https://github.com/MarcinMoskala/KotlinAcademyApp

I got:

webpack-internal:///146:145 [WDS] Warnings while compiling.
msgWarnings @ webpack-internal:///146:145
webpack-internal:///146:148 /home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/node_modules/kotlin.js
(Emitted value instead of an instance of Error) Cannot find SourceMap 'kotlin.js.map': Error: Can't resolve './kotlin.js.map' in '/home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/node_modules'
 @ /home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/classes/kotlin/main/common-client-js.js 1171:18-35
 @ ./js/web.js
 @ multi webpack-dev-server/client?http://localhost:8088/ webpack/hot/dev-server ./web
msgWarnings @ webpack-internal:///146:148
webpack-internal:///146:148 /home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/node_modules/kotlinx-coroutines-core-js.js
(Emitted value instead of an instance of Error) Cannot find SourceMap 'kotlinx-coroutines-core-js.js.map': Error: Can't resolve './kotlinx-coroutines-core-js.js.map' in '/home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/node_modules'
 @ /home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/classes/kotlin/main/common-client-js.js 1171:37-74
 @ ./js/web.js
 @ multi webpack-dev-server/client?http://localhost:8088/ webpack/hot/dev-server ./web
msgWarnings @ webpack-internal:///146:148
webpack-internal:///146:148 /home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/node_modules/common-js.js
(Emitted value instead of an instance of Error) Cannot find SourceMap 'common-js.js.map': Error: Can't resolve './common-js.js.map' in '/home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/node_modules'
 @ /home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/classes/kotlin/main/common-client-js.js 1171:76-96
 @ ./js/web.js
 @ multi webpack-dev-server/client?http://localhost:8088/ webpack/hot/dev-server ./web
msgWarnings @ webpack-internal:///146:148
webpack-internal:///146:148 /home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/node_modules/kotlinx-serialization-runtime-js.js
(Emitted value instead of an instance of Error) Cannot find SourceMap 'kotlinx-serialization-runtime-js.js.map': Error: Can't resolve './kotlinx-serialization-runtime-js.js.map' in '/home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/node_modules'
 @ /home/marcin/IdeaProjects/KotlinAcademyApp/common-client-js/build/classes/kotlin/main/common-client-js.js 1171:98-141
 @ ./js/web.js
 @ multi webpack-dev-server/client?http://localhost:8088/ webpack/hot/dev-server ./web

All these maps are generated and they can be found in node_modules_imported: