Please update to 2.0.4 and delete all caches. This issue should already be fixed.

About your issue, could be some conflict with an other plugin (a plugin that has to do with users).

I already tried many things, I was able to temporarily fix it by changing this lines of code (22-27) in the hooks.php file. I copied this code from a really old post that I found in your support forum. But as I said this just temporary, every new update I need to manually change the code. Is there a way you can help me?

ORIGINAL PIECE OF CODE:

add_action( 'show_admin_bar', function( $show_admin_bar ) {
	if( ! is_super_admin() && is_user_logged_in() && ! array_intersect( , (array) WPF()->wp_current_user->roles ) ) {
		$show_admin_bar = (bool) array_intersect( WPF()->current_user_groupids, wpforo_setting( 'general', 'admin_bar' ) );
	}
	return $show_admin_bar;
});



HOW I CHANGED IT: 

function my_admin_bar_control_function() {
    if (current_user_can('administrator') || current_user_can('editor') || current_user_can('author') ) {
        show_admin_bar(true);
    } else {
        show_admin_bar(false);
    }
}
add_action('init', 'my_admin_bar_control_function', 20);