Hi there!
Sorry for the inconvenience.
Could you please take a full backup of your website first, then uninstall all existing instances of SP Page Builder from your site and reinstall a fresh downloaded package through the Joomla extension installation page?
This should help in cases where some SP Page Builder files or database tables are missing and allow a clean installation.
If the issue still persists after reinstalling, please let us know. As a workaround, creating a basic "dummy" version of the missing database table manually can also allow the installer to recognize that the table exists and continue the installation process.
Please make sure to take a complete backup before making any database changes.
Best regards,