This question may looks dumb, but like two weeks ago, I had no problems with installing it. Now it looks like that:

ng add @ngx-formly/schematics --ui-theme=material

I tried install it after/before material and cdk modules, but the result is the same. I also tried to install all separate formly modules( on the base of projects that I created previously) and I get this error:

The package that you are trying to add does not support schematics. You can try using a different version of the package or contact the package author to add ng-add support.

I also tried to delete node modules and yarn.lock and init it again, but still it doesn't works. And also when I create form it just doesn't show. I also tried to install it with yarn add ... or -ui-theme=bootstrap, but the result is the same. Also tried to ng serve, before installing it(read it somewhere on stack), but it also doesn't work.

I have heard that there are some problems with node v.15.6.0, but I'm not sure if it's that. Here's also my versions:

and yarn version is 1.22.5

Update: I tried to upgrade all the packages with yarn upgrade --latest, then install formly again. And after:

 ng add @ngx-formly/schematics --ui-theme=material

I get that:

An unhandled exception occurred: Cannot find module '@schematics/angular/utility/config'
Require stack:
- /home/wiktor/angular-material-template/node_modules/@ngx-formly/schematics/utils/ast.js
- /home/wiktor/angular-material-template/node_modules/@ngx-formly/schematics/src/ng-add/index.js
- /home/wiktor/angular-material-template/node_modules/@angular-devkit/schematics/tools/export-ref.js
- /home/wiktor/angular-material-template/node_modules/@angular-devkit/schematics/tools/index.js
- /home/wiktor/angular-material-template/node_modules/@angular/cli/utilities/json-schema.js
- /home/wiktor/angular-material-template/node_modules/@angular/cli/models/command-runner.js
- /home/wiktor/angular-material-template/node_modules/@angular/cli/lib/cli/index.js
- /usr/lib/node_modules/@angular/cli/lib/init.js
- /usr/lib/node_modules/@angular/cli/bin/ng
See "/tmp/ng-rRKl9j/angular-errors.log" for further details.