Nextcloud Notes Apps crashed after Sync

[ANDREMOLENDA]

I get often an Error Message: from the official Playstore App, when i sync my notes with my Nextcloud Docker Instance. All Devices has the same issue. Other official GPLAY Nextcloud Apps works fine.

can you fixed please?

Detail Error Message from my Main device

App Version: 4.1.0 App Version Code: 40010090 App Flavor: play

Files App Version Code: 30280090 (PROD)

---

OS Version: 5.10.177-android12-9-00001-g219d8dfbba07-ab10551810(V816.0.4.0.UMYCNXM) OS API Level: 34 Device: liuqin Manufacturer: Xiaomi Model (and Product): 23046RP50C (liuqin)

---

android.accounts.NetworkErrorException: HTTP-Statuscode: 520
	at it.niedermann.owncloud.notes.manageaccounts.ManageAccountsActivity$4.lambda$onResponse$0$it-niedermann-owncloud-notes-manageaccounts-ManageAccountsActivity$4(ManageAccountsActivity.java:191)
	at it.niedermann.owncloud.notes.manageaccounts.ManageAccountsActivity$4$$ExternalSyntheticLambda0.run(Unknown Source:10)
	at android.os.Handler.handleCallback(Handler.java:958)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:224)
	at android.os.Looper.loop(Looper.java:318)
	at android.app.ActivityThread.main(ActivityThread.java:8752)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:561)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1013)

[joshtrichards]

HTTP-Statuscode: 520

Do you have a reverse proxy or something like Cloudflare in front of your Nextcloud Server?

What shows up in your Nextcloud Server log or web server log when this happens?