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I've installed angular6-json-schema-form. When I use the MaterialDesignFrameworkModule as in the example in documentation it works fine:

import BrowserModule from '@angular/platform-browser';
import NgModule from '@angular/core';

import MaterialDesignFrameworkModule from 'angular6-json-schema-form';

import AppComponent from './app.component';

@NgModule(
 declarations: [ AppComponent ],
 imports: [
 MaterialDesignFrameworkModule
 ],
 providers: [],
 bootstrap: [ AppComponent ]
)
export class AppModule 

However, when I use NoFrameworkModule (also described in the documentation), the json-schema-form html element stops working. I get this error:

Uncaught Error: Template parse errors:
Can't bind to 'schema' since it isn't a known property of 'json-schema-form'.
1. If 'json-schema-form' is an Angular component and it has 'schema' input, then verify that it is part of this module.
2. If 'json-schema-form' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.
3. To allow any property add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component. ("
 <json-schema-form
 loadExternalAssets="true"
 [ERROR ->][schema]="exampleJsonObject"
 framework="no-framework"
 [(ngModel)]="exampleJsonObject">
"): ng:///CatalogModule/DatagridComponent.html@3:4
'json-schema-form' is not a known element:
1. If 'json-schema-form' is an Angular component, then verify that it is part of this module.
2. If 'json-schema-form' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("<p>
 [ERROR ->]<json-schema-form
 loadExternalAssets="true"
 [schema]="exampleJsonObject"

Or, when I delete the [schema] attribute:

Uncaught Error: Template parse errors:
'json-schema-form' is not a known element:
1. If 'json-schema-form' is an Angular component, then verify that it is part of this module.
2. If 'json-schema-form' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("<p>
 [ERROR ->]<json-schema-form
 loadExternalAssets="true"
 framework="no-framework">
"): ng:///CatalogModule/DatagridComponent.html@1:2

How can I solve this problem? I use the package in version 7.1.0.