@prodigal_halogen Might be you need to reach out to the Cloudron team to ask what is happening.
It looks like it's trying to remove the node_modules/ folder, which is probably not what you want 😦
Slightly understanding the essence of the creation of plug-ins I copied everything from the sso-yandex and brought to the working version!
npm install nodebb-plugin-sso-vk
Or you can install from admin panel NodeBB!
Enjoy the new user badge