Assistance Required for License Activation on irisartwork.nl

I am writing to seek your assistance with an issue I am encountering regarding the activation of a license for a plugin on my website, irisartwork.nl.

Recently, I attempted to paste the license code on irisartwork.nl, but I noticed that the URL is displayed as afspraak.irisartwork.nl, which should actually be irisartwork.nl. When I enter the license code in the management section of irisartwork.nl, the plugin ‘Sales Countdown Timer’ does not recognize the license code.

Could you please assist me in resolving this issue? It appears to be a discrepancy between the actual website URL and the one recognized by the plugin for license activation. I would greatly appreciate your guidance on how to correctly activate my license on irisartwork.nl. My emailadres is info@erkpnr.com for envatomarket.
See attachment.

Thank you for your time and assistance in this matter.

Best regards,