Hi
Silambarasan,
This is .Net core 6 MVC so I have the registration Key registered in the program.cs which is working because I also have a rich text editor on the same page and removing the tabs removes the errors.
I have done some more investigating and after using your Getting Started sample for Tabs HTML Sample I found that when I add the script at the bottom the message is displayed.
Additionally, when I generated the licence key I told it to create it for ALL platforms.
Thanks
Phillip