StaticInjectorError(AppModule)[true]: NullInjectorError: No provider for true!

[rezaeieng1994]

After migration from angular 5 to angular 7 by this guide (https://update.angular.io), I get this error from corejs at the beginning of the web application loading.
First page doesn't load correctly but after it's loaded, everything works fine.
I've used lazy loading and I have a shared module that is used in the App Module, and the rest of the feature modules are loaded through the lazy load routing.
ERROR Error: StaticInjectorError(AppModule)[true]: StaticInjectorError(Platform: core)[true]: NullInjectorError: No provider for true! at _NullInjector.webpackJsonp../node_modules/@angular/core/esm5/core.js._NullInjector.get (core.js:994) at resolveToken (core.js:1292) at tryResolveToken (core.js:1234) at StaticInjector.webpackJsonp../node_modules/@angular/core/esm5/core.js.StaticInjector.get (core.js:1102) at resolveToken (core.js:1292) at tryResolveToken (core.js:1234) at StaticInjector.webpackJsonp../node_modules/@angular/core/esm5/core.js.StaticInjector.get (core.js:1102) at resolveNgModuleDep (core.js:10836) at _createProviderInstance$1 (core.js:10853) at resolveNgModuleDep (core.js:10832)

I'm not sure but in trace of call stack,I guessed the reason because of preloading.
what is wrong?

[rezaeieng1994]

@chuckjaz

[kara]

Closing this issue as it does not follow the issue template. Please file a new issue that follows the template, which gives the team the information needed to investigate.

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