diff --git a/app/javascript/dashboard/components/widgets/conversation/ReplyBox.vue b/app/javascript/dashboard/components/widgets/conversation/ReplyBox.vue
index 5d97076bb..9a2434fbf 100644
--- a/app/javascript/dashboard/components/widgets/conversation/ReplyBox.vue
+++ b/app/javascript/dashboard/components/widgets/conversation/ReplyBox.vue
@@ -169,7 +169,7 @@ export default {
       return this.maxLength - this.message.length;
     },
     isReplyButtonDisabled() {
-      const isMessageEmpty = !this.message.trim().replace(/\n/g, '').length;
+      const isMessageEmpty = this.isMessageEmpty;
 
       if (this.hasAttachments) return false;
       return (
@@ -235,6 +235,12 @@ export default {
     isOnPrivateNote() {
       return this.replyType === REPLY_EDITOR_MODES.NOTE;
     },
+    isMessageEmpty() {
+      if(!this.message) {
+        this.message = '';
+      }
+      return !this.message.trim().replace(/\n/g, '').length;
+    },
   },
   watch: {
     currentChat(conversation) {