IE9 Issue - Failed to instantiate module

I'm using Angular 1.6.3 for my SPA application. I'm using Grunt for building production-ready version of site.

In Google Chrome, FF, Opera, Safari works well. But when I try to load it in IE8, IE9 the next error occurs:

[$injector:modulerr] Failed to instantiate module myApp due to:
[$injector:nomod] Module 'myApp' is not available! You either misspelled the module name or forgot to load it.