Coupon not found in AWO Coupon pro

Dear Sir,

• Joomla 3.6.4
• VM 3.0.12
• AWO coupon Pro 2.5.0 ( how to update to lastest 2.5.3) show "Cannot validate website or license has expired" http://pasteboard.co/SHr6QngQ.png (valid til 2016-12-05)
  

Error message : Coupon code not found. please try again. http://pasteboard.co/SLXzU5Er.png

I am sure VMCoupon - AwoCoupon plug  is active.

Hello,

Please make sure the license and local key in AwoCoupon match exactly what is in your account here:
https://awodev.com/me/subscriptions

If it does not match this will cause update not to go through.  You can always manually update by getting the download file here
https://awodev.com/me/files

Unzipping and installing through Joomla installer.

For the coupon not found message, please go to awocoupon->configuration->error messages, click the debug button and save, then try the coupon again in the front end.  It should give more details now of why it is failing.