Calendar page navigation throws 404 error on some platforms

Additional information – attempting to change the layout from AGENDA to any other also throws the 404 error.

UPDATE: On further testing the successful page to page or display layout navigation seems to be predicated on being logged into the WordPress site (in my case) as administrator. If the user is not logged in navigation fails (regardless of platform).

Digging into the developer console 404 Error occurs on https://guillemot-trust.org.uk/?page_id=208/action~agenda/page_offset~1/request_format~json/&callback=jQuery2001047072457975939996_1713361374572&request_type=jsonp&ai1ec_doing_ajax=true&_=1713361374573

On further digging into the WordPress site, 208 refers to the in-built calendar page which the site neither needs nor uses … and thus in a recent tidying / tightening up of the site, the page was made PRIVATE as it does not need to be visible to visitors.

Reverting this to PUBLIC (oddly) fixed the issue!!