Empty page NC 26 beta 5

[derritter88]

Steps to reproduce

1. Use PHP 8.2-FPM
2. Install current Nextcloud 26 beta 5
3. Click on Mail icon

Expected behavior

Page should open

Actual behavior

Nothin is being shown

Mail app version

3.0.0-alpha.0

Mailserver or service

n/a (haven't configured anything)

Operating system

Ubuntu 22.04

PHP engine version

Other

Web server

Apache (supported)

Database

PostgreSQL

Additional info

NC log shows nothing but browser console does:

ReferenceError: process is not defined
    89539 util.js:109
    s where.js:43
    6464 index.module.js:2
    o index.module.js:2
    5108 index.module.js:2
    o index.module.js:2
    15961 index.module.js:2
    15961 index.module.js:2
    s where.js:43
    13276 mail.276.89f9c1d6ec23ffa66938.js:1
    s where.js:43
    promise callback*component router.js:26
    m vue-router.esm.js:2187
    vr vue-router.esm.js:2071
    vr vue-router.esm.js:2068
    vr vue-router.esm.js:2067
    m vue-router.esm.js:2340
    y vue-router.esm.js:2132
    r vue-router.esm.js:2047
    r vue-router.esm.js:2050
    yr vue-router.esm.js:2055
    confirmTransition vue-router.esm.js:2058
    transitionTo vue-router.esm.js:2231
    init vue-router.esm.js:2967
    beforeCreate vue-router.esm.js:1284
    VueJS 4
        kt
        en
        _init
        zn
    <anonymous> main.js:128
    <anonymous> main.js:130
    <anonymous> main.js:130
vue-router.esm.js:2287:60

[ChristophWurst]

Dup of #8145