In my case this was due to the following html code:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Testapp</title>
</head>
<body ng-app="testApp">
<main ui-view>
<script src="https://stackoverflow.com/questions/23499853/bower_components/jquery/jquery.js"></script>
<script src="bower_components/angular/angular.js"></script>
<script src="bower_components/angular-ui-router/release/angular-ui-router.js"></script>
<script src="scripts/main.js"></script>
</body>
</html>
As you can see, the <main>
is not closed. This led to my variant of ‘WARNING: Tried to load angular more than once.’ issue.