Hi,
Thank you for your message and for providing the details.
We apologize for the inconvenience this issue has caused.
We have checked your website and noticed that you are using a template that is not developed by JoomShaper. The template is overriding some of the core SP Page Builder addons. Among these overridden addons is the Pricing Table addon, which explains why you are encountering the error in the backend when trying to edit it.
Since the template is not developed or maintained by us, this falls outside the scope of our support. We recommend contacting the template author or the template provider so they can review and fix the override causing the conflict with SP Page Builder.
Thank you for your understanding. If you need any further assistance related to SP Page Builder itself, please feel free to let us know.