Compiling issue with angular 11

[Akashgkv]

I am currently utilizing Angular 11 and ckeditor4 for my project, but upon compilation, a few errors popped up. Has anyone else experienced this type of issue?

[AlexAegis]

If you are still using Angular 11, but with a recent version of (any) library, chances are the rendering engine requirements got mixed up. The library wants to use Ivy, but your angular version is too old. You either have to upgrade your Angular version, downgrade the version of the library, or if you are on an Angular version that supports both Ivy and the old rendering engine, make sure it's using the one the library also supports.