There is a known issues as of right now that on certain maps such as gm_flatgrass the arcs wings will be chrome. This is due to the map having "specular" lighting causing the wings to turn chrome.

Your game might freeze for a bit for the method below, and if it is not responding DONT click on the game this will cause it to crash. Reason being is because windows will think it isn't going to respond and will prompt you to close thus making it crash.
FYI: This may not happen to you depending on your hardware.

To fix this temporarily you must type the following into a server console.

mat_specular 0

Before[cdn.discordapp.com]
&
After[cdn.discordapp.com]

There is going to be a major update hopefully in a few months. However, there will not be another update to this addon until said major update. So while you wait try and figure out as many bugs, glitches, and everything else wrong with the addon.