Installing Wireguard to a provider as a vpn

[pasha-19]

Using the following instructions:

https://docs.opnsense.org/manual/how-tos/wireguard-selective-routing.html

Things seemed to go well through Step 6.  However; in Step 2 in reviewing the instructions it says to press save and press save again.  The first save closed the Instance window and the button on the screen said Apply (I did press it) and not Save, I did not notice that at the time.  I have no wireguard log messages.  My interfaces widget shows the wireguard tunnel as green.  The Wireguard Status screen has two lines of text for wg0. When I try to add the gateway in Step 6 the data entry seems to be straight forward.  However; when I click on the Save button the spinner flashes quickly and I am back at the Save button.  The window does not close and there is no apply changes button to hit.  What should I try next?  Am I by chance using the wrong instructions?

Thanks

Sorry. I am fully updated on 24.7.1