Installing Fluentd UI on windows (repost)

Hi,

I have installed and setup fluentd on windows server. This is working fine but I wanted to explore the fluent UI but I am getting an error during the install following the [guide](https://docs.fluentd.org/deployment/fluentd-ui)

Error output:
C:\Windows\system32>fluent-gem install fluentd-ui
Fetching: tzinfo-1.2.7.gem (100%)
Successfully installed tzinfo-1.2.7
Fetching: fluent-plugin-elasticsearch-2.12.5.gem (100%)
Successfully installed fluent-plugin-elasticsearch-2.12.5
Building native extensions. This could take a while...
ERROR: Error installing fluentd-ui:
ERROR: Failed to build gem native extension.

current directory: C:/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/bson-4.8.2/ext/bson
C:/opt/td-agent/embedded/bin/ruby.exe -r ./siteconf20200514-5780-1y6z48y.rb extconf.rb
creating Makefile

current directory: C:/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/bson-4.8.2/ext/bson
make "DESTDIR=" clean
C:/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/make-0.3.1/bin/make:4:in `': undefined local variable or method `make' for main:Object (NameError)
from C:/opt/td-agent/embedded/bin/make:23:in `load'
from C:/opt/td-agent/embedded/bin/make:23:in `'

current directory: C:/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/bson-4.8.2/ext/bson
make "DESTDIR="
C:/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/make-0.3.1/bin/make:4:in `': undefined local variable or method `make' for main:Object (NameError)
from C:/opt/td-agent/embedded/bin/make:23:in `load'
from C:/opt/td-agent/embedded/bin/make:23:in `'

make failed, exit code 1

Gem files will remain installed in C:/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/bson-4.8.2 for inspection.
Results logged to C:/opt/td-agent/embedded/lib/ruby/gems/2.4.0/extensions/x64-mingw32/2.4.0/bson-4.8.2/gem_make.out

I found [this](https://docs.fluentd.org/deployment/plugin-management) mentioning Failed to build gem native extension and need to install development packages. So after googling some more, I found some forums that mention installing ruby_dev and install Make

Even after doing this, I still get the same error. Wondering if anyone has any ideas please?