Message, Cannot read property 'isTitle' of undefined

Questions
1

Hi, I am using the message component and when I am adding a message or

messages.addMessage({
text: getData.cus_message,
type: ‘received’,
name: getData.fullname,
avatar: getData.pro_pic
});

in my console log showing this error

“Cannot read property ‘isTitle’ of undefined”

Here is my declaration of messages variable

messages = $f7.messages.create({
el: ‘.messages’,

        // First message rule
        firstMessageRule: function (message, previousMessage, nextMessage) {
        // Skip if title
        if (message.isTitle) return false;
        /* if:
            - there is no previous message
            - or previous message type (send/received) is different
            - or previous message sender name is different
        */
        if (!previousMessage || previousMessage.type !== message.type || previousMessage.name !== message.name) return true;
        return false;
        },
        // Last message rule
        lastMessageRule: function (message, previousMessage, nextMessage) {
        // Skip if title
        if (message.isTitle) return false;
        /* if:
            - there is no next message
            - or next message type (send/received) is different
            - or next message sender name is different
        */
        if (!nextMessage || nextMessage.type !== message.type || nextMessage.name !== message.name) return true;
        return false;
        },
        // Last message rule
        tailMessageRule: function (message, previousMessage, nextMessage) {
        // Skip if title
        if (message.isTitle) return false;
        /* if (basically same as lastMessageRule):
        - there is no next message
        - or next message type (send/received) is different
        - or next message sender name is different
        */
        if (!nextMessage || nextMessage.type !== message.type || nextMessage.name !== message.name) return true;
        return false;
        }
    });

Can you help to address this issue or if you had an experience like this. Please let me know how, Thank you.