Hello Fion,
Thank you for reaching out to us.
It appears that the issue you’re encountering may have already been present at the time the backup was created.
If you have administrator access, please log in and try reinstalling SP Page Builder. Additionally, check for any database structure issues by navigating to System → Maintenance → Database, selecting SP Page Builder, and updating the structure. This may help resolve the issue.
If the problem persists, please try creating a new backup and then restore from that.
Let me know the outcome after performing these steps.
Best regards,