fixed some minor NPE

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java

@@ -2551,6 +2551,9 @@ public class XmppConnectionService extends Service {
 					final MucOptions mucOptions = conversation.getMucOptions();
 
 					if (mucOptions.nonanonymous() && !mucOptions.membersOnly() && !conversation.getBooleanAttribute("accept_non_anonymous", false)) {
+					    synchronized (account.inProgressConferenceJoins) {
+                            account.inProgressConferenceJoins.remove(conversation);
+                        }
 					    mucOptions.setError(MucOptions.Error.NON_ANONYMOUS);
 					    updateConversationUi();
                         if (onConferenceJoined != null) {
@@ -2990,7 +2993,6 @@ public class XmppConnectionService extends Service {
 			@Override
 			public void onIqPacketReceived(Account account, IqPacket packet) {
 				if (packet.getType() == IqPacket.TYPE.RESULT) {
-
                     final MucOptions mucOptions = conversation.getMucOptions();
                     final Bookmark bookmark = conversation.getBookmark();
                     final boolean sameBefore = StringUtils.equals(bookmark == null ? null : bookmark.getBookmarkName(), mucOptions.getName());
@@ -3012,9 +3014,10 @@ public class XmppConnectionService extends Service {
                     }
 
 
-
                     updateConversationUi();
-				} else if (packet.getType() == IqPacket.TYPE.ERROR) {
+                } else if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
+                    Log.d(Config.LOGTAG,account.getJid().asBareJid()+": received timeout waiting for conference configuration fetch");
+				} else {
 					if (callback != null) {
 						callback.onFetchFailed(conversation, packet.getError());
 					}

src/main/java/eu/siacs/conversations/ui/ConversationFragment.java

@@ -1552,7 +1552,8 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
                 intent = GeoHelper.getFetchIntent(activity);
                 break;
         }
-        if (intent.resolveActivity(getActivity().getPackageManager()) != null) {
+        final Context context = getActivity();
+        if (context != null && intent.resolveActivity(context.getPackageManager()) != null) {
             if (chooser) {
                 startActivityForResult(
                         Intent.createChooser(intent, getString(R.string.perform_action_with)),

src/main/java/eu/siacs/conversations/ui/adapter/ChannelSearchResultAdapter.java

@@ -16,6 +16,7 @@ import eu.siacs.conversations.R;
 import eu.siacs.conversations.databinding.SearchResultItemBinding;
 import eu.siacs.conversations.http.services.MuclumbusService;
 import eu.siacs.conversations.ui.util.AvatarWorkerTask;
+import rocks.xmpp.addr.Jid;
 
 public class ChannelSearchResultAdapter extends ListAdapter<MuclumbusService.Room, ChannelSearchResultAdapter.ViewHolder> {
 
@@ -61,7 +62,8 @@ public class ChannelSearchResultAdapter extends ListAdapter<MuclumbusService.Roo
             viewHolder.binding.language.setText(language.toUpperCase(Locale.ENGLISH));
             viewHolder.binding.language.setVisibility(View.VISIBLE);
         }
-        viewHolder.binding.room.setText(searchResult.getRoom().asBareJid().toString());
+        final Jid room = searchResult.getRoom();
+        viewHolder.binding.room.setText(room != null ? room.asBareJid().toString() : "");
         AvatarWorkerTask.loadAvatar(searchResult, viewHolder.binding.avatar, R.dimen.avatar);
         viewHolder.binding.getRoot().setOnClickListener(v -> listener.onChannelSearchResult(searchResult));
     }

src/main/java/eu/siacs/conversations/ui/util/MucDetailsContextMenuHelper.java

@@ -147,6 +147,8 @@ public final class MucDetailsContextMenuHelper {
                 activity.xmppConnectionService.changeAffiliationInConference(conversation, jid, MucOptions.Affiliation.ADMIN, onAffiliationChanged);
                 return true;
             case R.id.give_membership:
+            case R.id.remove_admin_privileges:
+            case R.id.revoke_owner_privileges:
                 activity.xmppConnectionService.changeAffiliationInConference(conversation, jid, MucOptions.Affiliation.MEMBER, onAffiliationChanged);
                 return true;
             case R.id.give_owner_privileges:
@@ -155,10 +157,6 @@ public final class MucDetailsContextMenuHelper {
             case R.id.remove_membership:
                 activity.xmppConnectionService.changeAffiliationInConference(conversation, jid, MucOptions.Affiliation.NONE, onAffiliationChanged);
                 return true;
-            case R.id.remove_admin_privileges:
-            case R.id.revoke_owner_privileges:
-                activity.xmppConnectionService.changeAffiliationInConference(conversation, jid, MucOptions.Affiliation.MEMBER, onAffiliationChanged);
-                return true;
             case R.id.remove_from_room:
                 removeFromRoom(user, activity, onAffiliationChanged);
                 return true;