Issue with Spirit Upfront theme?

Hi,
I just installed the Spirit Upfront theme on a new WP install, wanted to make some changes so clicked on the "Upfront" button in the top WPAdmin toolbar but then it comes with an error saying "Please, hold on for just a little bit more" click ok and nothing happens try click again then it says same thing and adds "Prevent this page from creating additional Dialogues" ? not sure where Clicking Customise does nothing? see screenshot - https://monosnap.com/file/MM8QM7ja8K8ahTEgZPQ8gZswvAtIVa

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Thanks
Tom