1.14 - Windows smart proxy won't run

While attempting to update our dhcp smart proxy on a Windows 2008R2 system
from 1.13 to 1.14, I receive the following error:

C:/smart-proxy/lib/proxy/log.rb:35:in &lt;class:LoggerFactory&gt;&#39;: &gt; uninitialized con &gt; stant Proxy::LoggerFactory::Syslog (NameError) &gt; from C:/smart-proxy/lib/proxy/log.rb:22:in<module:Proxy>'
> from C:/smart-proxy/lib/proxy/log.rb:15:in &lt;top (required)&gt;&#39; &gt; from C:/smart-proxy/lib/launcher.rb:1:inrequire'
> from C:/smart-proxy/lib/launcher.rb:1:in &lt;top (required)&gt;&#39; &gt; from C:/smart-proxy/lib/smart_proxy_main.rb:4:inrequire'
> from C:/smart-proxy/lib/smart_proxy_main.rb:4:in &lt;top (required)&gt;&#39; &gt; from bin/smart-proxy-win-service:8:inrequire'
> from bin/smart-proxy-win-service:8:in `<main>'

Using ruby 2.3.3p222

Has anyone else seen this?

Thanks.