Your browser is somehow using the old version of this app. Thats why it is causing the error.
I have updated the app.
Goto http://app.mindmapmaker.org again. After sometime, the app will be updated.
After updation, check if the problem still persists.
If it still is there, send me the screenshot of console again.
Try a new browser, then it will use a fresh copy of the app. Then it will be okay I think.
2. Also try this.
In chrome browser, goto, chrome://appcache-internals/
There you will see app.mindmapmaker.org Remove that item.
Then goto app.mindmapmaker.org again. It will then install the updated copy of the app.
Let me know if it works.
3. Also try this. Inorder to delete the old version of mindmaps from your browser. Click, Chrome Menu->More Tools->Clear Browsing Data... Click on 'Advanced' and select 'All Time' from Time Range. Then select all items in the box to properly remove the mindmap app from your browser. It will take some time to clear the browser. Then relaunch http://app.mindmapmaker.org Check if the app is okay now. Regards,