App details: java.lang.NullPointerException

• Device OS and version: Android 13
• Device model/manufacturer: Samsung SM-S901B
• F-Droid version (in the About screen): 1.16.3
• F-Droid privileged extension version (if installed): -

What did you do? (clear steps if possible)

• added repo https://srv.tt-rss.org/fdroid/repo
• install app "Tiny Tiny RSS"
• go to main screen of f-droid
• enter "Tiny Tiny RSS" app details again

What did you expect to see?

• the app details and the current app versions of the repo

What did you see instead?

f-droid crashes:

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
	at org.fdroid.fdroid.data.App.findSuggestedApk(App.java:555)
	at org.fdroid.fdroid.data.App.findSuggestedApk(App.java:537)
	at org.fdroid.fdroid.data.App.update(App.java:299)
	at org.fdroid.fdroid.views.AppDetailsActivity.updateAppInfo(AppDetailsActivity.java:747)
	at org.fdroid.fdroid.views.AppDetailsActivity.onVersionsChanged(AppDetailsActivity.java:734)
	at org.fdroid.fdroid.views.AppDetailsActivity.$r8$lambda$lgtpLd3OEgQKVJA9DmWlIbk-RDQ(Unknown Source:0)
	at org.fdroid.fdroid.views.AppDetailsActivity$$ExternalSyntheticLambda2.onChanged(Unknown Source:4)
	at androidx.lifecycle.LiveData.considerNotify(LiveData.java:133)
	at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:151)
	at androidx.lifecycle.LiveData.setValue(LiveData.java:309)
	at androidx.lifecycle.LiveData$1.run(LiveData.java:93)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:226)
	at android.os.Looper.loop(Looper.java:313)
	at android.app.ActivityThread.main(ActivityThread.java:8757)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)