Currently, I'm working in a project of angular6,
I configured ng-block-ui properly( i already used ng-block-ui in one of the projects in angular5), but I am facing an issue with ng-block-ui as below while binding in component template

```
block-ui' is not a known element:
1. If 'block-ui' is an Angular component, then verify that it is part of this module.
2. If 'block-ui' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("
[ERROR ->]<block-ui>
 <!-- Your app markup here -->
</block-ui>
"): ng:///HtmlLayoutModule/AdminComponent.html@0:0
Error: Template parse errors:

```

this is the versions I am using 

```
"ng-block-ui": "^1.0.4",
"primeng": "^6.0.0-alpha.1",
"rxjs": "^6.2.0",
"rxjs-compat": "^6.2.0",

```