plane/space/pages/404.tsx

// next imports
import { observer } from "mobx-react-lite";
import Image from "next/image";
// hooks
import { useInstance } from "@/hooks/store";
// images
import notFoundImage from "public/404.svg";

const Custom404Error = observer(() => {
  // hooks
  const { instance } = useInstance();

  const redirectionUrl = instance?.config?.app_base_url || "/";

  return (
    <div className="relative flex h-full min-h-screen w-screen items-center justify-center py-5">
      <div className="max-w-[700px] space-y-5">
        <div className="flex flex-col items-center gap-3 text-center">
          <div className="relative h-[240px] w-[240px]">
            <Image src={notFoundImage} layout="fill" alt="404- Page not found" />
          </div>
          <div className="text-xl font-medium">Oops! Something went wrong.</div>
          <div className="text-sm text-custom-text-200">
            Sorry, the page you are looking for cannot be found. It may have been removed, had its name changed, or is
            temporarily unavailable.
          </div>
        </div>

        <div className="flex items-center justify-center text-center">
          <a
            href={redirectionUrl}
            className="cursor-pointer select-none rounded-sm border border-gray-200 bg-gray-50 p-1.5 px-2.5 text-sm font-medium text-gray-700 transition-all hover:scale-105 hover:bg-gray-100 hover:text-gray-800"
          >
            Go to your Workspace
          </a>
        </div>
      </div>
    </div>
  );
});

export default Custom404Error;