After establishing a connection for Cache Server (global), Cache Server gets connected but the icon doesn't get highlighted on unity taskbar for Unity Personal Theme. "Unable to load Cache Server icon" errors thrown in console, refer attached screenshot.

Steps to Reproduce:
1. Open attached project.
2. Edit > Preferences > Cache Server (global)
3. Set Cache Server Default Mode > Enabled
4. Provide Default IP address credentials
5. Click on Check Connection > Connection get establish

Actual Result:
Icon doesn't get highlighted on unity taskbar for Unity Personal Theme, after establishing Cache Server connection

Expected Result:
After Cache Server got connected, the icon gets highlighted on unity taskbar

Occurring on:
2020.1.0a23

Note:
1. This Cache Server icon was introduced in 2020.1.0a23
2. Unable to load Cache Server icon errors thrown in console, refer attached screenshot.

Environment:
Occurring on Windows 10 & Mac 10.15.