Note: Do this after installing the latest package.
Permission Set
To have access to the PosiPay feature, assign PosiPay’s Permission Set to a User with a System Administrator profile.
...
Choose PosiPay and click Add to Enabled Permissions Sets then click Save. You have access to all objects and fields in the PosiPay org.
Enable Communities
Enable the experience cloud communities.
Setup > Digital Experiences > Settings > tick Enable Digital Experiences > click Save
...
Community Site
Go to Setup > All Sites > Click New
...
The Community page should be accessible by Guest User
...
Webhook Guest User Profile Config
Webhook Object Access
Go to Set up > Search for Digital Experience in the Quick Find Box > Click All Sites
...
Gateway Event
Click Edit and tick Read and Create under the Object Permissions as well as in Fields Permissions and click Save.
Gateway Account
PosiPay Log
Webhook Listener Class
In the Quick Find box in the Setup Homepage search Profiles under Administration
...