Notes Android App: CertificateCombinedException

On my Notes android app, I get an error message that it can’t load. The self signed cert. has been updated. I logout, then attempt to login again, but it still errors out. I would think there would be a prompt to accept the new cert.
Here is what it is saying:

App Version: 3.4.18
App Version Code: 3004018
App Flavor: fdroid

Files App Version Code: 30180190OS Version: 4.19.202-g900043908355(2022013120)
OS API Level: 31
Device: barbet
Manufacturer: Google
Model (and Product): Pixel 5a (barbet)java.lang.ClassNotFoundException: com.owncloud.android.lib.common.network.CertificateCombinedException
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:454)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:682)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1703)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1594)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1872)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1412)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2114)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:557)
at java.lang.Throwable.readObject(Throwable.java:951)
at java.lang.reflect.Method.invoke(Native Method)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1066)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2013)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1899)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1412)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2114)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:557)
at java.lang.Throwable.readObject(Throwable.java:951)
at java.lang.reflect.Method.invoke(Native Method)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1066)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2013)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1899)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1412)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:427)
at com.nextcloud.android.sso.api.AidlNetworkRequest.deserializeObjectV2(AidlNetworkRequest.java:325)
at com.nextcloud.android.sso.api.AidlNetworkRequest.performNetworkRequestV2(AidlNetworkRequest.java:183)
at com.nextcloud.android.sso.api.NextcloudAPI.performNetworkRequestV2(NextcloudAPI.java:199)
at com.nextcloud.android.sso.api.NextcloudAPI.lambda$performRequestObservableV2$1$com-nextcloud-android-sso-api-NextcloudAPI(NextcloudAPI.java:129)
at com.nextcloud.android.sso.api.NextcloudAPI$$ExternalSyntheticLambda2.subscribe(Unknown Source:6)
at io.reactivex.internal.operators.observable.ObservableFromPublisher.subscribeActual(ObservableFromPublisher.java:31)
at io.reactivex.Observable.subscribe(Observable.java:12284)
at io.reactivex.internal.operators.observable.ObservableSingleMaybe.subscribeActual(ObservableSingleMaybe.java:31)
at io.reactivex.Maybe.subscribe(Maybe.java:4290)
at io.reactivex.Maybe.blockingGet(Maybe.java:2320)
at io.reactivex.Observable.blockingSingle(Observable.java:5381)
at it.niedermann.owncloud.notes.persistence.CapabilitiesClient.getCapabilities(CapabilitiesClient.java:32)
at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity.lambda$onActivityResult$5$it-niedermann-owncloud-notes-importaccount-ImportAccountActivity(ImportAccountActivity.java:97)
at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity$$ExternalSyntheticLambda6.run(Unknown Source:4)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:920)
Caused by: java.lang.ClassNotFoundException: com.owncloud.android.lib.common.network.CertificateCombinedException
... 43 more

Have you checked your Nextcloud Android App (not Notes Android)?

Does it show you a hint regarding certificates?