Can't install documentation plugin via admin dashboard
Describe the bug When tried to install documentation plugin from administration dashboard its occurs with the error.
Steps to reproduce the behavior
- Follow documentation to install Strapi and mongoDB with docker-compose Installing using Docker
- Choose Polish Language as a dashboard language (It was automatically selected in my case) Using English Language installation was successful, only when Polish language (and maybe others) is selected its occurs with errors
- Go to Marketplace in Administration Dashboard and try to install Documentation Plugin
Expected behavior Installed documentation without errors.
Code snippets Code wasn't modified. Fresh installation.
System
- Node.js version: v12.18.2
- YARN_VERSION 1.22.4
- Strapi version: v3.1.1
- Database: MongoDB v4.2.8
- Operating system: MacOS Catalina (Strapi and MongoDB installed in docker)
Additional context

Hi @oskar-gmerek thanks for reporting. This one is a tricky One. I would recommend you do it manualy for now as we need to review how we can install a plugin when we need to restart the process and rebuild the admin. Quite a difficult task :)
I installed the documentation plugin without problems after changed language to english. Just reporting something is wrong there. Im not familiar enough yet to find the bug by myself.