Wishing to use this with angular 7 application. Running into some issues

[kcox40]

Has anyone used this in an angular2+ application before?
Currently getting this error:
`'rich-text-diff' is not a known element:

1. If 'rich-text-diff' is an Angular component, then verify that it is part of this module.
2. If 'rich-text-diff' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("

   
   admin-version-control works!
   [ERROR ->]

"): ng:///AppModule/AdminVersionControlComponent.html@2:2 at syntaxError (compiler.js:2547) at TemplateParser.push../node_modules/@angular/compiler/fesm5/compiler.js.TemplateParser.parse (compiler.js:19495) at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._parseTemplate (compiler.js:25041) at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileTemplate (compiler.js:25028) at compiler.js:24971 at Set.forEach () at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileComponents (compiler.js:24971) at compiler.js:24881 at Object.then (compiler.js:2538) at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileModuleAndComponents (compiler.js:24880)`