Firebase Function Error: could not handle the request + Next App - node.js

Question

This might seem like a repeated question but i promise I've made sure
to check every related ones but non solve my problem
I am deploying a nextjs app on Firebase hosting using cloud functions,
the app does deploy and gives me back the hosting URL of app
link. visiting the URL i got this 403 forbidden error;
Your client does not have permission to get URL /nextServer/ from this server.
Which I fixed by adding allUsers and allAuthenticatedUsers as function invoker at function permission.
But then, after fixing that I got another error saying:
Error: could not handle the request
this terminated the function with a log of
Function execution took 804 ms, finished with status: 'crash'
This doesn't give any reason why the function crashed which has made fixing it all the more harder. Below is my nextServer function code:
const { https } = require("firebase-functions");
const { default: next } = require("next");
const isDev = process.env.NODE_ENV !== "production";
const server = next({
dev: isDev,
conf: { distDir: ".next" },
});
const nextjsHandle = server.getRequestHandler();
exports.nextServer = https.onRequest((req, res) => {
return server.prepare().then(() => {
return nextjsHandle(req, res);
});
});
and this is the firebase.json:
{
"hosting": {
"public": "public",
"site": "webavocat",
"ignore": [
"firebase.json",
"**/.*",
"**/node_modules/**"
],
"rewrites": [
{
"source": "**",
"function": "nextServer"
}
]
},
"functions": {
"source": ".",
"runtime": "nodejs16",
"ignore": [
"**/.vscode/**",
".firebase/**",
".firebaserc",
"firebase.json",
"**/node_modules/**",
"**/public/**",
"**/.next/cache/**"
]
}
}
The project folder structure is as shown below
Edit 1:
Don't really know if this is correct,
const nextjsHandle = server.getRequestHandler();
exports.nextServer = https.onRequest((req, res) => {
try {
return server.prepare().then(() => {
return nextjsHandle(req, res);
});
} catch (error) {
console.error(error);
}
});
but i used a try catch on the on the server function as #mdobrucki suggested. still no log on the why the function crashed though