I have app in next JS with typescript. I want upload app on vercel but this error occurs. I have no idea what is wrong in my /api/favourites/drivingSchoolId.
I have got that problem is related with my route.ts but it doesnt make any sense.

Error message:

/api/favourites/drivingSchoolId/route.ts

import { NextResponse } from "next/server";

import getCurrentUser from "@/app/actions/getCurrentUser";
import prisma from "@/app/libs/prismadb";

interface IParams {
    drivingSchoolId?: string;
}

export async function POST(request: Request, { params }: { params: IParams }) {
    const currentUser = await getCurrentUser();
    if (!currentUser) return NextResponse.error();

    const { drivingSchoolId } = params;

    if (!drivingSchoolId) {
        return NextResponse.json({ success: true, message: "Tato autoškola není dostupná" }, { status: 400 });
    }

    const alreadyExists = await prisma.user_favourite_car_driving_school.findFirst({
        where: {
            AND: [{ user_id: currentUser.user_id }, { driving_school_id: Number(drivingSchoolId) }],
        },
    });

    if (alreadyExists) return NextResponse.json({ success: true, message: "Počkejte chvílu, ukládám záznam" }, { status: 400 });

    await prisma.user_favourite_car_driving_school.create({
        data: {
            user_id: currentUser.user_id,
            driving_school_id: Number(drivingSchoolId),
        },
    });

    return NextResponse.json({ success: true, message: "Označeno jako oblíbené" }, { status: 200 });
}

export async function DELETE(request: Request, { params }: { params: IParams }) {
    const currentUser = await getCurrentUser();

    if (!currentUser) return NextResponse.error();

    const { drivingSchoolId } = params;

    if (!drivingSchoolId) return NextResponse.json({ success: true, message: "Tato autoškola není dostupná" }, { status: 400 });

    await prisma.user_favourite_car_driving_school.deleteMany({
        where: {
            AND: [{ user_id: currentUser.user_id }, { driving_school_id: Number(drivingSchoolId) }],
        },
    });

    return NextResponse.json({ success: true, message: "Zrušeno oblíbené" }, { status: 200 });
}