关于anguler运行出现Could not load /modules/.. route的问题

F12查看页面报错

ERROR Error: Uncaught (in promise): NullInjectorError: R3InjectorError(DataQueryModule)[ModalHelper -> NzModalService -> NzModalService -> NzModalService -> NzModalService -> NzModalService -> NzModalService]: 
  NullInjectorError: No provider for NzModalService!
NullInjectorError: R3InjectorError(DataQueryModule)[ModalHelper -> NzModalService -> NzModalService -> NzModalService -> NzModalService -> NzModalService -> NzModalService]: 
  NullInjectorError: No provider for NzModalService!
    at NullInjector.get (core.js:11120)
    at R3Injector.get (core.js:11287)
    at R3Injector.get (core.js:11287)
    at R3Injector.get (core.js:11287)
    at NgModuleRef$1.get (core.js:25352)
    at R3Injector.get (core.js:11287)
    at NgModuleRef$1.get (core.js:25352)
    at R3Injector.get (core.js:11287)
    at NgModuleRef$1.get (core.js:25352)
    at R3Injector.get (core.js:11287)
    at resolvePromise (zone.js:1211)
    at resolvePromise (zone.js:1165)
    at zone.js:1278
    at _ZoneDelegate.invokeTask (zone.js:406)
    at Object.onInvokeTask (core.js:28679)
    at _ZoneDelegate.invokeTask (zone.js:405)
    at Zone.runTask (zone.js:178)
    at drainMicroTaskQueue (zone.js:585)

后面查了一下，发现是node_moduls里面有不同版本的依赖

找到自己的pack.json，看到系统是用哪个版本的， 把另外一个版本删除了即可