diff --git a/database/message.go b/database/message.go
index 904e8b0..c6a2790 100644
--- a/database/message.go
+++ b/database/message.go
@@ -129,10 +129,9 @@ func (msg *Message) encodeBinaryContent() []byte {
 	return buf.Bytes()
 }
 
-func (msg *Message) Insert() error {
+func (msg *Message) Insert() {
 	_, err := msg.db.Exec("INSERT INTO message VALUES (?, ?, ?, ?, ?, ?)", msg.Chat.JID, msg.Chat.Receiver, msg.JID, msg.MXID, msg.Sender, msg.encodeBinaryContent())
 	if err != nil {
 		msg.log.Warnfln("Failed to insert %s@%s: %v", msg.Chat, msg.JID, err)
 	}
-	return err
 }
diff --git a/database/portal.go b/database/portal.go
index ec40fac..60eb486 100644
--- a/database/portal.go
+++ b/database/portal.go
@@ -142,16 +142,15 @@ func (portal *Portal) mxidPtr() *string {
 	return nil
 }
 
-func (portal *Portal) Insert() error {
+func (portal *Portal) Insert() {
 	_, err := portal.db.Exec("INSERT INTO portal VALUES (?, ?, ?, ?, ?, ?)",
 		portal.Key.JID, portal.Key.Receiver, portal.mxidPtr(), portal.Name, portal.Topic, portal.Avatar)
 	if err != nil {
 		portal.log.Warnfln("Failed to insert %s: %v", portal.Key, err)
 	}
-	return err
 }
 
-func (portal *Portal) Update() error {
+func (portal *Portal) Update() {
 	var mxid *string
 	if len(portal.MXID) > 0 {
 		mxid = &portal.MXID
@@ -161,5 +160,4 @@ func (portal *Portal) Update() error {
 	if err != nil {
 		portal.log.Warnfln("Failed to update %s: %v", portal.Key, err)
 	}
-	return err
 }
diff --git a/database/puppet.go b/database/puppet.go
index afccdc2..3e1b169 100644
--- a/database/puppet.go
+++ b/database/puppet.go
@@ -92,20 +92,18 @@ func (puppet *Puppet) Scan(row Scannable) *Puppet {
 	return puppet
 }
 
-func (puppet *Puppet) Insert() error {
+func (puppet *Puppet) Insert() {
 	_, err := puppet.db.Exec("INSERT INTO puppet VALUES (?, ?, ?, ?)",
 		puppet.JID, puppet.Avatar, puppet.Displayname, puppet.NameQuality)
 	if err != nil {
 		puppet.log.Warnfln("Failed to insert %s: %v", puppet.JID, err)
 	}
-	return err
 }
 
-func (puppet *Puppet) Update() error {
+func (puppet *Puppet) Update() {
 	_, err := puppet.db.Exec("UPDATE puppet SET displayname=?, name_quality=?, avatar=? WHERE jid=?",
 		puppet.Displayname, puppet.NameQuality, puppet.Avatar, puppet.JID)
 	if err != nil {
 		puppet.log.Warnfln("Failed to update %s->%s: %v", puppet.JID, err)
 	}
-	return err
 }
diff --git a/database/user.go b/database/user.go
index f7ccba2..090d70a 100644
--- a/database/user.go
+++ b/database/user.go
@@ -148,7 +148,7 @@ func (user *User) sessionUnptr() (sess whatsapp.Session) {
 	return
 }
 
-func (user *User) Insert() error {
+func (user *User) Insert() {
 	sess := user.sessionUnptr()
 	_, err := user.db.Exec("INSERT INTO user VALUES (?, ?, ?, ?, ?, ?, ?, ?)", user.MXID, user.jidPtr(),
 		user.ManagementRoom,
@@ -156,10 +156,9 @@ func (user *User) Insert() error {
 	if err != nil {
 		user.log.Warnfln("Failed to insert %s: %v", user.MXID, err)
 	}
-	return err
 }
 
-func (user *User) Update() error {
+func (user *User) Update() {
 	sess := user.sessionUnptr()
 	_, err := user.db.Exec("UPDATE user SET jid=?, management_room=?, client_id=?, client_token=?, server_token=?, enc_key=?, mac_key=? WHERE mxid=?",
 		user.jidPtr(), user.ManagementRoom,
@@ -168,5 +167,4 @@ func (user *User) Update() error {
 	if err != nil {
 		user.log.Warnfln("Failed to update %s: %v", user.MXID, err)
 	}
-	return err
 }
diff --git a/go.mod b/go.mod
index 134b468..8679b92 100644
--- a/go.mod
+++ b/go.mod
@@ -14,3 +14,7 @@ require (
 	maunium.net/go/mautrix v0.1.0-alpha.3
 	maunium.net/go/mautrix-appservice v0.1.0-alpha.3
 )
+
+replace maunium.net/go/mautrix => ../mautrix-go
+
+replace maunium.net/go/mautrix-appservice => ../mautrix-appservice-go
diff --git a/main.go b/main.go
index f18cf34..22ee7a9 100644
--- a/main.go
+++ b/main.go
@@ -33,7 +33,7 @@ import (
 )
 
 var configPath = flag.MakeFull("c", "config", "The path to your config file.", "config.yaml").String()
-var baseConfigPath = flag.MakeFull("b", "base-config", "The path to the example config file.", "example-config.yaml").String()
+//var baseConfigPath = flag.MakeFull("b", "base-config", "The path to the example config file.", "example-config.yaml").String()
 var registrationPath = flag.MakeFull("r", "registration", "The path where to save the appservice registration.", "registration.yaml").String()
 var generateRegistration = flag.MakeFull("g", "generate-registration", "Generate registration and quit.", "false").Bool()
 var wantHelp, _ = flag.MakeHelpFlag()
diff --git a/portal.go b/portal.go
index 97c0d37..ea8a306 100644
--- a/portal.go
+++ b/portal.go
@@ -222,13 +222,19 @@ func (portal *Portal) SyncParticipants(metadata *whatsappExt.GroupInfo) {
 	}
 	for _, participant := range metadata.Participants {
 		puppet := portal.bridge.GetPuppetByJID(participant.JID)
-		puppet.Intent().EnsureJoined(portal.MXID)
+		err := puppet.Intent().EnsureJoined(portal.MXID)
+		if err != nil {
+			portal.log.Warnfln("Failed to make puppet of %s join %s: %v", participant.JID, portal.MXID, err)
+		}
 
 		user := portal.bridge.GetUserByJID(participant.JID)
 		if user != nil && !portal.bridge.AS.StateStore.IsInvited(portal.MXID, user.MXID) {
-			portal.MainIntent().InviteUser(portal.MXID, &mautrix.ReqInviteUser{
+			_, err = portal.MainIntent().InviteUser(portal.MXID, &mautrix.ReqInviteUser{
 				UserID: user.MXID,
 			})
+			if err != nil {
+				portal.log.Warnfln("Failed to invite %s to %s: %v", user.MXID, portal.MXID, err)
+			}
 		}
 
 		expectedLevel := 0
@@ -272,14 +278,14 @@ func (portal *Portal) UpdateAvatar(user *User, avatar *whatsappExt.ProfilePicInf
 
 	data, err := avatar.DownloadBytes()
 	if err != nil {
-		portal.log.Errorln("Failed to download avatar:", err)
+		portal.log.Warnln("Failed to download avatar:", err)
 		return false
 	}
 
 	mimeType := http.DetectContentType(data)
 	resp, err := portal.MainIntent().UploadBytes(data, mimeType)
 	if err != nil {
-		portal.log.Errorln("Failed to upload avatar:", err)
+		portal.log.Warnln("Failed to upload avatar:", err)
 		return false
 	}
 
@@ -354,7 +360,10 @@ func (portal *Portal) Sync(user *User, contact whatsapp.Contact) {
 			return
 		}
 	} else {
-		portal.MainIntent().EnsureInvited(portal.MXID, user.MXID)
+		err := portal.MainIntent().EnsureInvited(portal.MXID, user.MXID)
+		if err != nil {
+			portal.log.Warnfln("Failed to ensure %s is invited to %s: %v", user.MXID, portal.MXID, err)
+		}
 	}
 
 	update := false
@@ -569,7 +578,7 @@ func (portal *Portal) HandleTextMessage(source *User, message whatsapp.TextMessa
 	portal.bridge.Formatter.ParseWhatsApp(content)
 	portal.SetReply(content, message.Info)
 
-	intent.UserTyping(portal.MXID, false, 0)
+	_, _ = intent.UserTyping(portal.MXID, false, 0)
 	resp, err := intent.SendMassagedMessageEvent(portal.MXID, mautrix.EventMessage, content, int64(message.Info.Timestamp*1000))
 	if err != nil {
 		portal.log.Errorfln("Failed to handle message %s: %v", message.Info.Id, err)
@@ -653,7 +662,7 @@ func (portal *Portal) HandleMediaMessage(source *User, download func() ([]byte,
 		content.MsgType = mautrix.MsgFile
 	}
 
-	intent.UserTyping(portal.MXID, false, 0)
+	_, _ = intent.UserTyping(portal.MXID, false, 0)
 	ts := int64(info.Timestamp * 1000)
 	resp, err := intent.SendMassagedMessageEvent(portal.MXID, mautrix.EventMessage, content, ts)
 	if err != nil {
@@ -768,6 +777,7 @@ func (portal *Portal) HandleMatrixMessage(sender *User, evt *mautrix.Event) {
 	if portal.IsPrivateChat() && sender.JID != portal.Key.Receiver {
 		return
 	}
+	portal.log.Debugfln("Received event %s", evt.ID)
 
 	ts := uint64(evt.Timestamp / 1000)
 	status := waProto.WebMessageInfo_ERROR
@@ -880,6 +890,7 @@ func (portal *Portal) HandleMatrixMessage(sender *User, evt *mautrix.Event) {
 		return
 	}
 	portal.markHandled(sender, info, evt.ID)
+	portal.log.Debugln("Sending event", evt.ID, "to WhatsApp")
 	err = sender.Conn.Send(info)
 	if err != nil {
 		portal.log.Errorfln("Error handling Matrix event %s: %v", evt.ID, err)
diff --git a/puppet.go b/puppet.go
index cb654f8..70ab56d 100644
--- a/puppet.go
+++ b/puppet.go
@@ -131,7 +131,7 @@ func (puppet *Puppet) UpdateAvatar(source *User, avatar *whatsappExt.ProfilePicI
 		var err error
 		avatar, err = source.Conn.GetProfilePicThumb(puppet.JID)
 		if err != nil {
-			puppet.log.Errorln(err)
+			puppet.log.Warnln("Failed to get avatar:", err)
 			return false
 		}
 	}
@@ -141,31 +141,40 @@ func (puppet *Puppet) UpdateAvatar(source *User, avatar *whatsappExt.ProfilePicI
 	}
 
 	if len(avatar.URL) == 0 {
-		puppet.Intent().SetAvatarURL("")
+		err := puppet.Intent().SetAvatarURL("")
+		if err != nil {
+			puppet.log.Warnln("Failed to remove avatar:", err)
+		}
 		puppet.Avatar = avatar.Tag
 		return true
 	}
 
 	data, err := avatar.DownloadBytes()
 	if err != nil {
-		puppet.log.Errorln("Failed to download avatar:", err)
+		puppet.log.Warnln("Failed to download avatar:", err)
 		return false
 	}
 
 	mime := http.DetectContentType(data)
 	resp, err := puppet.Intent().UploadBytes(data, mime)
 	if err != nil {
-		puppet.log.Errorln("Failed to upload avatar:", err)
+		puppet.log.Warnln("Failed to upload avatar:", err)
 		return false
 	}
 
-	puppet.Intent().SetAvatarURL(resp.ContentURI)
+	err = puppet.Intent().SetAvatarURL(resp.ContentURI)
+	if err != nil {
+		puppet.log.Warnln("Failed to set avatar:", err)
+	}
 	puppet.Avatar = avatar.Tag
 	return true
 }
 
 func (puppet *Puppet) Sync(source *User, contact whatsapp.Contact) {
-	puppet.Intent().EnsureRegistered()
+	err := puppet.Intent().EnsureRegistered()
+	if err != nil {
+		puppet.log.Errorln("Failed to ensure registered:", err)
+	}
 
 	if contact.Jid == source.JID {
 		contact.Notify = source.Conn.Info.Pushname
diff --git a/user.go b/user.go
index eebf70e..40ac6b9 100644
--- a/user.go
+++ b/user.go
@@ -192,7 +192,10 @@ func (user *User) Login(roomID types.MatrixRoomID) {
 			return
 		}
 
-		bot.SendImage(roomID, string(code), resp.ContentURI)
+		_, err = bot.SendImage(roomID, string(code), resp.ContentURI)
+		if err != nil {
+			user.log.Errorln("Failed to send QR code to user:", err)
+		}
 	}()
 	session, err := user.Conn.Login(qrChan)
 	if err != nil {
@@ -204,7 +207,10 @@ func (user *User) Login(roomID types.MatrixRoomID) {
 	user.JID = strings.Replace(user.Conn.Info.Wid, whatsappExt.OldUserSuffix, whatsappExt.NewUserSuffix, 1)
 	user.Session = &session
 	user.Update()
-	bot.SendNotice(roomID, "Successfully logged in. Now, you may ask for `import contacts`.")
+	_, err = bot.SendNotice(roomID, "Successfully logged in. Now, you may ask for `import contacts`.")
+	if err != nil {
+		user.log.Warnln("Failed to send login confirmation to user:", err)
+	}
 }
 
 func (user *User) HandleError(err error) {