Only one donation form per page allowed

I am using the Donation Platform for Woocommerce on a new website, with the Astra theme. I installed the donation plugin last week and it worked, but now every time I go to my donation page I just get the message “Only one donation form per page allowed.”

I switched to the twenty-twenty-two theme to see if that made a difference, and it worked fine. So it’s obviously an issue with the Astra theme. However, it worked fine last week, and now it doesn’t, yet I don’t believe anything has changed.

Has anyone else had this problem, or have any suggestions or solutions? Thanks.