Hello, an error message appears when I activate the Subscriptio plugin and wp backery(see screenshot):
https://drive.google.com/file/d/1h8shOouC_hCrHJv2ZkhWFcRYb-ftac68/view?usp=sharing
https://drive.google.com/file/d/1-06uUA02ZtAEJVye7uEEQSkneYR5Dz-W/view?usp=sharing
https://citarature.com/?post_type=product&p=8493&preview=true