Ngx-Quill ERROR in Directive QuillEditorBase

I have the same exact issue

Date: 2020-07-27T07:45:39.650Z - Hash: 674c36d8cc4fe0a89c1d - Time: 39499ms
ERROR in : Directive QuillEditorBase in /Users/louie/Development/mobile/node_modules/ngx-quill/ngx-quill.d.ts has no selector, please add it!
: Cannot determine the module for class QuillEditorBase in /Users/louie/Development/mobile/node_modules/ngx-quill/ngx-quill.d.ts! Add QuillEditorBase to the NgModule to fix it.
[ERROR] An error occurred while running subprocess ng.

Since I am using Ionic Cordova 4 with Angular ~8.1.2 and "quill": "^1.3.7", "ngx-quill": "^12.0.0".

I checked the documentation of quill and found this.

Compatibility to Angular Versions
Angular ngx-quill   supported
v10 >= 12.0.0   until Feb 24, 2022
v9  >= 8.0.0    until Aug 06, 2021
v8  >= 5.2.0, < 9   until Nov 28, 2020

So, in order to resolve the issue I have. I downgraded ngx-quill from v12.0.0 to 5.2.0. And it compiled successfully after.