OK, I asked what a random-string is on
this thread, and found a random hash generator.
It gave me - R9xP0ze8w0
So, I added this at the end of the xF config.php file - $config['globalSalt'] = ‘R9xP0ze8w0’
And I totally lost my WP - nothing but blank white pages.
So, I've put the globalSalt back into the WP dashboard and still xF users can't login to WP.
This is so frustrating, as it seems such a good idea, especially as I’ve got the WordPress Proxy working, so any suggestions would be gratefully received.