NullInjectorError: No provider for NbDialogRef!

i am using nebular modal dailog if i calling NbDailogRef in component getting below error

**Error details
core.js:7187 ERROR Error: Uncaught (in promise): NullInjectorError: StaticInjectorError(AppModule)[DemoTemplateComponent -> NbDialogRef]:
StaticInjectorError(Platform: core)[DemoTemplateComponent -> NbDialogRef]:
NullInjectorError: No provider for NbDialogRef!
NullInjectorError: StaticInjectorError(AppModule)[DemoTemplateComponent -> NbDialogRef]:
StaticInjectorError(Platform: core)[DemoTemplateComponent -> NbDialogRef]:
NullInjectorError: No provider for NbDialogRef!
at NullInjector.get (core.js:1354)
at resolveToken (core.js:1681)
at tryResolveToken (core.js:1607)
at StaticInjector.get (core.js:1470)
at resolveToken (core.js:1681)
at tryResolveToken (core.js:1607)
at StaticInjector.get (core.js:1470)
at resolveNgModuleDep (core.js:23104)
at NgModuleRef_.get (core.js:24192)
at resolveNgModuleDep (core.js:23104)
at resolvePromise (zone-evergreen.js:797)
at resolvePromise (zone-evergreen.js:754)
at zone-evergreen.js:858
at ZoneDelegate.invokeTask (zone-evergreen.js:391)
at Object.onInvokeTask (core.js:30873)
at ZoneDelegate.invokeTask (zone-evergreen.js:390)
at Zone.runTask (zone-evergreen.js:168)
at drainMicroTaskQueue (zone-evergreen.js:559)

**Related code:**

### Other information:

**npm, node, OS, Browser**
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**Angular, Nebular**