Unable to activate my theme with this new update ( it was activated before )

So, My theme was already activated but with this new update, it again asked to activate it.

I tried adding my purchase code like before but nothing happened ( no response from page, kind of non-responsive)

Then I took a bigger step, like :

Used manual activation page: http://tagdiv.com/td_cake/manual.php
Posted my Server ID there and the Envato purchase code

Generated the activation key successfully and paste it the form but still nothing happened. the’activation button’ behaved as if nothing is being clicked. What’s the issue? Why is it happening.

Kindly help me resolve it.

If you need extra data like login access etc. , let me know.

Thanks.

Sent a mail. Thanks.