Compile error after updating to Express v5

[json-derulo]

Command

build

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

In a fresh Angular 19 SSR app with Server Routing, after updating to Express v5 I'm getting a compile error.

Minimal Reproduction

• Generate a new project: ng new express5-repro --ssr --server-routing --style=css
• In this project, update the dependencies express and @types/express to v5
• Run ng build

Exception or Error

Application bundle generation failed.

✘ [ERROR] An error occurred while extracting routes.

Missing parameter name at 2: https://git.new/pathToRegexpError

Your Environment

Angular CLI: 19.2.5
Node: 22.14.0
Package Manager: npm 11.2.0
OS: darwin arm64

Angular: 19.2.4
... common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, platform-server
... router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1902.5
@angular-devkit/build-angular   19.2.5
@angular-devkit/core            19.2.5
@angular-devkit/schematics      19.2.5
@angular/cli                    19.2.5
@angular/ssr                    19.2.5
@schematics/angular             19.2.5
rxjs                            7.8.2
typescript                      5.7.3
zone.js                         0.15.0

Anything else relevant?

No response

[alan-agius4]

This is expected. The server.ts needs to be updated also to support express version 5. See: https://expressjs.com/en/guide/migrating-5.html#app.router

[json-derulo]

For anyone facing the same error, as per #29989 it can be fixed by modifying the src/server.ts file.

Simply change the following line:

app.use('/**', (req, res, next) => {

To:

app.use((req, res, next) => {