Sencha cmd build failed

I created a new app and tried to build it right away. During the build (sencha app build) I am getting the following error:

[INF] Building optimized concatenated output..

[INF] Compressing data with YuiJavascriptCompressor

[ERR] C2009: YUI Parse Error (missing ; before statement => var rm-server = rm-server || {}; ) -- unknown-file:35:8

[ERR] C2009: YUI Parse Error (Invalid assignment left-hand side. => if (!rm-server.view) rm-server.view = {}; ) -- unknown-file:36:41

[ERR] C2009: YUI Parse Error (Compilation produced 2 syntax errors. => null) -- unknown-file:2

Any idea why I'm getting this error on a new app?