Error in GET /fetch-transactions: TypeError: s.Wallet is not a constructor

I'm currently trying to fetch-transactions in a serverless function using vercel and getting this error:

    Error in GET /fetch-transactions: TypeError: s.Wallet is not a constructor

Is there a special way to connect when doing so from a server?

Here is my code:

    export const runtime = 'nodejs';    export const dynamic = 'force-dynamic';    import { NextResponse } from 'next/server';    import { getPrismaClient } from '../utils/prisma';    import * as anchor from '@coral-xyz/anchor';    export async function GET(request) {      const prisma = getPrismaClient();      const { searchParams } = new URL(request.url);      const address = searchParams.get('address');      if (!address) {        return NextResponse.json({ error: 'Address is required' }, { status: 400 });      }      try {        const rpcEndpoint = process.env.NEXT_PUBLIC_RPC_ENDPOINT;        const serverKeypairBase64 = process.env.SERVER_KEYPAIR_BASE64;        if (!rpcEndpoint) {          throw new Error('RPC endpoint is not defined in NEXT_PUBLIC_RPC_ENDPOINT');        }        if (!serverKeypairBase64) {          throw new Error('Server keypair is not defined in SERVER_KEYPAIR_BASE64');        }        const serverKeypairUint8Array = Uint8Array.from(          JSON.parse(Buffer.from(serverKeypairBase64, 'base64').toString())        );        console.log('DEBUG CHECK 1');        const serverKeypair = anchor.web3.Keypair.fromSecretKey(serverKeypairUint8Array);        console.log('DEBUG CHECK 2');        const wallet = new anchor.Wallet(serverKeypair);        console.log('DEBUG CHECK 3');        const connection = new anchor.web3.Connection(rpcEndpoint, 'confirmed');        console.log('DEBUG CHECK 4');        const provider = new anchor.AnchorProvider(connection, wallet, {});        anchor.setProvider(provider);        const programId = new anchor.web3.PublicKey('PROGRAM_ID');        const idl = await anchor.Program.fetchIdl(programId, provider);        const program = new anchor.Program(idl, programId, provider);

The server logs:

DEBUG CHECK 1DEBUG CHECK 2 

and then the error

Thanks for your help!