Form field error

In order to use link pager in new versions of yii2, we need to set the link pager classes in the definition according to bootsrapt4, we understood this and thank you for your help. but now there is a problem. When I run the dropdown page created with the form field inside the activeform in a view, I get an error like this.
how can i fix this.

So model is an array and not an object?
How do you declare the field?

1 Like

can you post full stack as text?
Also post relevant parts of controller action