Snapshot Pro not loading Archive page when attempting restore

Hi Support Team,

I am following this guide to perform a full site migration: https://premium.wpmudev.org/blog/easy-migration-snapshot/

I have reached the point where you click Restore to review what you would like to migrate.

However after a short period of loading, the table is returned empty, (please see this screenshot): http://screencast.com/t/Qojbqy7Ni9

Please be aware I don't currently have FTP access and only very basic server file management and database options via Plesk with this site due to issues/unresponsiveness of the host company. This is why I opted to use Snapshot Pro for this migration as in theory it's not needed.

Theme being used is Select Stockholm - https://themeforest.net/item/stockholm-a-genuinely-multiconcept-theme/8819050

Any advice you can give is greatly appreciated.