angular.min.js:125 Error: [$controller:ctrlreg] http://errors.angularjs.org/1.6.7/$controller/ctrlreg?p0=mainCtrl

    at angular.min.js:7

    at angular.min.js:94

    at Object.<anonymous> (angular-ui-router.min.js:11)

    at angular.min.js:17

    at wa (angular.min.js:85)

    at q (angular.min.js:71)

    at f (angular.min.js:62)

    at angular.min.js:62

    at angular.min.js:67

    at p (angular-ui-router.min.js:11) "<div ui-view="" class="ng-scope">"

(anonymous) @ angular.min.js:125

(anonymous) @ angular.min.js:96

wa @ angular.min.js:85

q @ angular.min.js:71

f @ angular.min.js:62

(anonymous) @ angular.min.js:62

(anonymous) @ angular.min.js:67

p @ angular-ui-router.min.js:11

configUpdated @ angular-ui-router.min.js:11

(anonymous) @ angular-ui-router.min.js:11

t.sync @ angular-ui-router.min.js:11

yn @ angular-ui-router.min.js:11

e.invokeHook @ angular-ui-router.min.js:11

(anonymous) @ angular-ui-router.min.js:11

e.runAllHooks @ angular-ui-router.min.js:11

(anonymous) @ angular-ui-router.min.js:11

(anonymous) @ angular.min.js:137

$digest @ angular.min.js:148

$apply @ angular.min.js:151

l @ angular.min.js:103

s @ angular.min.js:108

y.onload @ angular.min.js:109

XMLHttpRequest.send (async)

(anonymous) @ angular.min.js:110

q @ angular.min.js:105

(anonymous) @ angular.min.js:102

(anonymous) @ angular.min.js:137

$digest @ angular.min.js:148

$apply @ angular.min.js:151

(anonymous) @ angular.min.js:22

invoke @ angular.min.js:44

c @ angular.min.js:22

Uc @ angular.min.js:22

we @ angular.min.js:21

(anonymous) @ angular.min.js:335

b @ angular.min.js:38