borisv

when I paste manually something like http://sitename.xyz/logout/?redirect_to=/index.php i can logout.

So that is resolved. There is nothing wrong with UM. I suspect you have a server configuration problem that would be off topic discussion here.

There doesn’t appear to be a problem with that url query string. I would check the user role and change the log out to “Go to custom url” then enter a different location (e.g. /index.php or /member/) and see what happens.

Perhaps you have a corrupt JS AJAX file. I would clone your site and delete UM, then install an old copy first, then update to the latest. If it works, then you know what the problem was. I work with UM version 1.3.26, BTW, so no problems for me.

You could ask a developer to code all that for you. Some of us work for small donations for small projects such as this…

Try this code instead:

add_filter('um_user_profile_tabs', 'custom_tab' );
function custom_tab($tabs) {
	//Add tab
	$tabs['test_tab'] = array(
		'name' => 'Test Tab',
		'icon' => 'um-faicon-users',
		'count' => 0
	);
	return $tabs;
}

add_filter('um_profile_content_test_tab', 'custom_tab_content' );
function custom_tab_content($args) {
	echo do_shortcode('[ultimatemember form_id=81]');
}

I’m not sure what you mean. The modification you ask is unnecessary since the login page consists of 2 buttons: login and register.

WP nonces are security tokens. What’s the url to your registration page?