Steps to reproduce:

Create fresh angular 9+ project : ng new angular9-kendo-editor-test

run cmd to add editor module: ng add @progress/kendo-angular-editor

Add config to serve es5 generated scripts so IE will work: https://medium.com/better-programming/how-to-fix-your-angular-app-when-its-not-working-in-ie11-eb24cb6d9920

run cmd to serve es5 config: ng serve --configuration es5

Open IE and browse to http://localhost:4200

Open developer tools, observe there is a script error

Comment out the EditorModule import in app.module.ts and you can see the app now works...

When i refresh page wich contains Editor i give error -  Cannot read property 'createElement' of null wheb i refresh page

i try hide edtor while not initilized, content initilized, this dont help