Hello,
We added some compatibility fix to our theme but you also need to contact the plugin author and ask him to add the compatibility with our theme https://prnt.sc/p29anf , the code below to wp-content/plugins/dynamic-menu-pro/edit_custom_walker.php
if (class_exists( 'NMI_Walker_Nav_Menu_Edit' ) ){
$nmi_walker_nav = new NMI_Walker_Nav_Menu_Edit();
return $nmi_walker_nav->start_el($output, $item,$depth,$args,$id);
}
In other case once you update the plugin you will face the same problem again.
Regards