i’m getting EPERM: operation not permitted error while executing “ionic cordova run android” command, how to fix it?

F:\IOINC-PROJECTS\Auto-Service-Repair>ionic cordova run android
[INFO] Running app-scripts build: --platform android --target cordova

[16:33:14] build dev started …
[16:33:14] clean started …
[16:33:14] clean finished in 5 ms
[16:33:14] copy started …
[16:33:14] transpile started …
[16:33:16] transpile finished in 2.04 s
[16:33:16] preprocess started …
[16:33:16] deeplinks started …
[16:33:16] deeplinks finished in 80 ms
[16:33:16] preprocess finished in 82 ms
[16:33:16] webpack started …
[16:33:16] copy finished in 2.30 s
[16:33:22] webpack finished in 6.43 s
[16:33:22] sass started …
[16:33:23] sass finished in 761 ms
[16:33:23] postprocess started …
Error: EPERM: operation not permitted, unlink 'F:\IOINC-PROJECTS\Auto Service Re
pair\www\assets\fonts\roboto’
at Error (native)

And ionic info is blow:

F:\IOINC-PROJECTS\Auto Service Repair>ionic info

cli packages: (C:\Users\Conference\AppData\Roaming\npm\node_modules)

@ionic/cli-utils  : 1.12.0
ionic (Ionic CLI) : 3.12.0
global packages:
cordova (Cordova CLI) : 7.0.1
local packages:
@ionic/app-scripts : 2.1.4
Cordova Platforms  : none
Ionic Framework    : ionic-angular 3.6.1
System:
Android SDK Tools : 25.2.5
Node              : v6.11.3
npm               : 3.10.10
OS                : Windows 8.1
Misc:
backend : legacy