Thank you for the response. Changing to ‘default’ did solve the error. So this must mean I have a permalink issue.
I am not following this part of your message, ” after you set to default you can again set to your custom post, which will show you the setting that need to be added to .htaccess”.
What do you mean when you say “set to your custom post” and how will this show the setting that needs to be added to the .htaccess?
Thanks
Kat