Answer
The reason for this issue could be that your current Foxit PDF Editor still recognizes the expired trial license associated with a personal account. To resolve this, you need to click on the people icon in the top right corner of Foxit PDF Editor Cloud, select the "Association" option from the pop-up drop-down menu, and then in the next menu that appears, choose the organization name assigned to you from the Foxit Admin console to switch your Foxit PDF Editor Cloud to use the license allocated by the Foxit Admin console platform. This will successfully activate your Foxit PDF Editor Cloud.