Not taking to paypal payment rectangular button


Hi
<img width="904" alt="Screenshot 2024-04-11 174243" src="https://github.com/danielneis/moodle-availability_paypal/assets/114048004/92b42cfb-a518-4beb-898c-e7425d76e1d0">

I have installed paypal plugin. Instance and course price created. However, while accessing , the 'paypal' rectangular button is not seen. Only the attached screen appears. 
Thank you.