Giving an error when adding a new feed

Checklist

• I've already searched in existing issues and haven't found a similar problem reported.
• I'm using the latest version of the app
• This error caused the app to crash
• This error is reproducible

Which category best fits this error?

Feed Sync

App version

0.15.2

Reproduction steps

1. https://www.xda-developers.com/feed/

...

Crash report

Version: 0.15.2
Device: samsung SM-G996B
System: Android 15 (API 35)

Stack trace: 

.lang.IllegalArgumentException: feedId is null
	at me.ash.reader.domain.service.GoogleReaderRssService.subscribe(GoogleReaderRssService.kt:535)
	at me.ash.reader.domain.service.GoogleReaderRssService$subscribe$1.invokeSuspend(GoogleReaderRssService.kt:19)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
	at kotlinx.coroutines.internal.ScopeCoroutine.afterResume(Scopes.kt:7)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:23)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:32)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:115)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:96)
	Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@3607045, Dispatchers.Default]

Start at me.ash.reader.domain.service.GoogleReaderRssService.kt:535, where subscribe reports that feedId is null. Reproduce the feed-add flow with https://www.xda-developers.com/feed/ on app version 0.15.2 and trace how the feed ID is obtained; done means the feed can be added without this exception.