While typing my code in WebStorm OR IntelliJ (both latest versions), the code below gives me an error that in my opinion shouldn't be there.

Am I missing something in my code here or could this be an IDE problem?

Error

Argument of type '{ body: { content: string; fileType: FileType; groups: string[]; name: string; }; }' is not assignable to parameter of type 'CreateTemplate'.
Object literal may only specify known properties, and 'body' does not exist in type 'CreateTemplate'.

Dialog.component.ts

accept(): void {
  this.api.createTemplate({
    body: {
      content: '',
      fileType: this.filetypeFull,
      groups: this.selectedGroups,
      name: this.filename
    }
  })
this.dialogRef.close();

}

api.service.ts

createTemplate(params: {
  body: CreateTemplate
}): Observable<Template> {
  return this.createTemplate$Response(params).pipe(
    map((r: StrictHttpResponse<Template>) => r.body as Template)
  );
}

create-template.model.ts

export interface CreateTemplate {
  content?: string;
  fileType: FileType;
  groups: Array<string>;
  name: string;
}