Error encountered when reconfiguring schema for author document type in Sanity Studio.

import { BsPen } from "react-icons/bs";

import { figure } from "../shared/figure";
import { portableTextSimple } from "../shared/portableTextSimple";
import { portableText } from "../shared/portableText";
import { slug } from "../shared/slug";

import type { Rule } from "@sanity/types";

export default {
  title: "Author",
  name: "author",
  type: "document",
  fields: [
    {
      title: "Name",
      name: "name",
      type: "string",
      validation: (Rule: Rule) => Rule.required(),
    },
    slug({
      source: "name",
      basePath: "/author",
    }),
    {
      title: "Title",
      name: "title",
      type: "string",
      validation: (Rule: Rule) => Rule.required(),
    },
    figure({ title: "Image", name: "image" }),
    portableTextSimple({
      options: {
        validation: (Rule: Rule) => Rule.max(250),
      },
    }),
    {
      title: "Featured Posts",
      name: "featuredPosts",
      type: "array",
      of: [{ type: "reference", to: [{ type: "blogPost" }] }],
      validation: (Rule: Rule) => Rule.required().max(3),
    },
    portableText({
      title: "Featured Posts Content",
      name: "featuredPostsContent",
    }),
  ],
  preview: {
    select: {
      name: "name",
      slug: "slug.current",
    },
    prepare({ name, slug }) {
      return {
        title: `[Author] - ${name || "Untitled"}`,
        description: slug ? `URL: ${slug}` : "",
        media: BsPen,
      };
    },
  },
};

//import Tabs from "sanity-plugin-tabs";

import { BsFilePost } from "react-icons/bs";

import { figure } from "../shared/figure";
import { portableTextSimple } from "../shared/portableTextSimple";
import { portableText } from "../shared/portableText";
import { slug } from "../shared/slug";
import { tabFix } from "../shared/tabFix";

import type { Rule } from "@sanity/types";

export default {
  title: "Author",
  name: "author",
  type: "document",
  //inputComponent: Tabs,
  fieldsets: [
    { name: "main", title: "Content" },
    { name: "seo", title: "SEO / Meta" },
  ],
  fields: [
    {
      type: "object",
      name: "content",
      fieldset: "main",
      fields: [
        {
          ...tabFix(),
        },
        {
          title: "Name",
          name: "name",
          type: "string",
          validation: (Rule: Rule) => Rule.required(),
        },
        slug({
          source: "name",
          basePath: "/author",
        }),
        {
          title: "Title",
          name: "title",
          type: "string",
          validation: (Rule: Rule) => Rule.required(),
        },
        figure({
          title: "Image",
          name: "image",
        }),
        portableTextSimple({
          options: {
            validation: (Rule: Rule) => Rule.max(250),
          },
        }),
        {
          title: "Featured Posts",
          name: "featuredPosts",
          type: "array",
          of: [{ type: "reference", weak: true, to: [{ type: "blogPost" }] }],
          validation: (Rule) => Rule.max(5),
        },
        {
          title: "Carousel Label - Only shown on Mobile",
          name: "carouselLabel",
          type: "string",
        },
        portableText({
          title: "Featured Posts Content",
          name: "featuredPostsContent",
        }),
      ],
    },
    {
      type: "meta",
      name: "seo",
      fieldset: "seo",
    },
  ],
  preview: {
    select: {
      title: "content.title",
      slug: "content.slug.current",
    },
    prepare({ title, slug }) {
      return {
        title: `[Author] - ${title || "Untitled"}`,
        description: slug ? `URL: ${slug}` : "",
        media: BsFilePost,
      };
    },
  },
};