Ok, well there was no info from there - and the last couple of times I’ve emailed support I have not had a reply.
I’ll post my solution to this in case others want to fix it. All I had to do in the end was reset my machine.
I was also getting the error because the LEExtendedScript plugin had 2 entries in my .uproject - I removed the LEExtScript reference and was then able to update the plugin and remove any error messages.