Endless Login Loop

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Steps to reproduce

1. Enter address of server
2. Login to server
3. Click Grant Access

Expected behaviour

Grant Access should then allow me to see my files

Actual behaviour

Get taken back to login again. No amount of trying gets me any further

Logs

If applicable, you can post the iOS app or server logs (removing any sensitive information).

Reasoning or why should it be changed/implemented?

Environment data

iOS version: e.g. iOS 17.6.1
18.4.1

Nextcloud iOS app version: see More > Settings
6.6.2

Server operating system:
Linux 6.6.78-Unraid #2 SMP PREEMPT_DYNAMIC Thu Feb 20 13:33:15 PST 2025 x86_64

Web server:
Apache/2.4.63 (Unix) (fpm-fcgi)

Database:
pgsql PostgreSQL 16.8 on x86_64-pc-linux-musl, compiled by gcc (Alpine 14.2.0) 14.2.0, 64-bit

PHP version:
8.3.20

Nextcloud version:
30.0.10.1

No source files, tests, logs, or entry points are identified. Reproduce the sequence with iOS 18.4.1, app 6.6.2, and the reported server setup, then trace the login and Grant Access flow; done means authentication completes and the app shows the server files instead of returning to login.