Then I think you might have added the new tab incorrectly.
I was able to add a new tab, following the plugin’s documentation and select it as default.
This is the code I use to add 2 tabs. I have only added how to fill the content of 1 tab because the 2nd one is identical.
/**
* Add custom profile tabs
*
* @param $tabs
*
* @return mixed
*/
function fr_add_custom_profile_tabs( $tabs ) {
$tabs[ 'registrations' ] = array(
'name' => 'Registrations',
'icon' => 'um-faicon-list-ul',
);
$tabs[ 'bookmarks' ] = array(
'name' => 'Bookmarks',
'icon' => 'um-faicon-bookmark',
);
return $tabs;
}
add_filter( 'um_profile_tabs', 'fr_add_custom_profile_tabs', 1000 );
/**
* Content for custom tab 'registrations'
*
* @param $args
*/
function fr_profile_content_registrations( $args ) {
echo "<p>This will show the user's registrations.</p>";
}
add_action( 'um_profile_content_registrations', 'fr_profile_content_registrations' );
After saving it and loading the page, I was able to select any page as default.
See screenshot: https://imgur.com/a/IHmzfCh
