Hello,
Try this code in wp-admin >> wplms >> footer >> google analytics.
<script>
function move_popup(){
if(jQuery(window).width() < 700){
jQuery('input#side-user-login,input#sidebar-user-pass').on('blur',function(){
jQuery('.fullscreen_login form#vbp-login-form').css('overflow-y','scroll');
});
jQuery('input#side-user-login,input#sidebar-user-pass').on('focus',function(){
jQuery('.fullscreen_login form#vbp-login-form').css('overflow-y','scroll');
});
}
}
jQuery(document).ready(function(){
move_popup();
jQuery( window ).resize(function() {
move_popup();
});
});
</script>