Worldpay donation was not marked 'paid'

I have the os_worldpay payment plugin for JoomDonation. Since 15 May no donations are marked as 'paid', despite being processed correctly through Worldpay. As a consequence no emails are being sent out as thank yous or to inform our admin team.

Did the payment plugin expire, or is there some other config change I should be aware of?

Hi Robert,
I am not sure about this issue, could you please upgrade latest Joom Donation version and check the Worldpay payment gateway again?
Thanks
Dam