Do you support the guest site user?

Guest Site Users in Salesforce can be challenging to work with. They use a highly restricted license type with very limited access, and Salesforce continues to tighten security around them. To make things easier, we’ve provided both a permission set and detailed guidance on the required sharing rules.

Keep in mind that Salesforce enforces strict limitations on these users — they often lack object, field, and record access. This restriction can cause invocable actions and other automations to fail if access isn’t configured correctly.

Please see this for more information - https://www.beaufort12.com/mailchimp/support/user-security#GuestSiteUser