Can't activiate licence in BA Forms

Hi Balbooa Team,
I've a new joomla "‎5.4.7"‎ installation with balbooa forms 2.4.3.1. When trying to activate the licence in forms nothing happens after clicking the "ACTIVATE" button. I only see the request at the bottom of my browser (see screenshot) but nothing else happens. I've tried it in different browsers.

BG
Eduard

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