Crash while creating new group / folder

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 Management

App version

0.16.1

Reproduction steps

1. Add a new feed
2. Paste RSS link
3. Tag it with a new group/folder that you're trying to create
4. Try to hit submit
   ...

Crash report

Version: 0.16.1
Device: Google Pixel 9
System: Android 16 (API 36)

Stack trace: 

(message='BadRequest', query=null, params=null, form=null)
	at me.ash.reader.infrastructure.rss.provider.greader.GoogleReaderAPI$subscriptionEdit$$inlined$retryablePostRequest$default$1.invokeSuspend(GoogleReaderAPI.kt:338)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:112)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:126)
	Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@b2ce066, Dispatchers.Default]

Start at GoogleReaderAPI.kt:338, where the crash report shows subscriptionEdit failing, and reproduce the issue by adding a feed and assigning a newly created group or folder. Check the request path using the supplied app version and stack trace. Done means submitting the feed with the new group or folder no longer crashes.