Can't login to my self-hosted Nextcloud server with my own self-signed SSL certificate

[leap0x7b]

⚠️ Before posting ⚠️

• [X] This is a bug, not a question or an enhancement.
• [X] I've searched for similar issues and didn't find a duplicate.
• [X] I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
• [X] I agree to follow Nextcloud's Code of Conduct.

Steps to reproduce

1. Create a self-signed key for my web server

   openssl req -x509 -nodes -days 365 -newkey rsa:4096 -keyout /etc/ssl/nextcloud-selfsigned.pem -out /etc/ssl/nextcloud-selfsigned.pem

2. Set up Nextcloud
3. Add the self-signed certificate to Android
4. Login to your self-hosted instance

Expected behaviour

Should log me in to the app.

Actual behaviour

Just crashes for some reason.

Android version

6.0.1

Device brand and model

vivo 1606

Stock or custom OS?

Stock

Nextcloud android app version

3.25.0

Nextcloud server version

27.1.3

Using a reverse proxy?

No

Android logs

No response

Server error logs

No response

Additional information

Cause of error

Exception in thread "main" android.util.AndroidRuntimeException: requestFeature() must be called before adding content
    at com.android.internal.policy.PhoneWindow.requestFeature(PhoneWindow.java:352)
    at android.app.Dialog.requestWindowFeature(Dialog.java:1126)
    at com.owncloud.android.ui.dialog.SslUntrustedCertDialog.onCreateDialog(SslUntrustedCertDialog.java:168)
    at androidx.fragment.app.DialogFragment.prepareDialog(DialogFragment.java:665)
    at androidx.fragment.app.DialogFragment.onGetLayoutInflater(DialogFragment.java:579)
    at androidx.fragment.app.Fragment.performGetLayoutInflater(Fragment.java:1755)
    at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:493)
    at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:261)
    at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1901)
    at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1819)
    at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1762)
    at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:547)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5619)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:853)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:737)

App information

• ID: com.nextcloud.client
• Version: 30250090
• Build flavor: generic

Device information

• Brand: vivo
• Device: 1606
• Model: vivo 1606
• Id: MMB29M
• Product: 1606

Firmware

• SDK: 23
• Release: 6.0.1
• Incremental: eng.compiler.20190105.211334

[joshtrichards]

Hi @leap0x7b - Thanks for your report. Looks like a duplicate of #11677. Let's consolidate tracking over there. I encourage you to upvote for prioritization - and subscribe if you wish to monitor.