Judging by other comments on this post, as well as a spate of other recent posts with similar issues, there appears to be some fundamental issues with the plugin at the moment and I don’t see why I should pay nearly $200AUD to have them fixed for the benefit of everyone. I’ll just wait for your next update and if that doesnt fix it, will migrate all sites to RankMath.
Here is a screenshot of the Javascript errors: https://ibb.co/8DwTpD6m